Dark Blue synthetic hard caver book of 440 pages with gold lettering embossed on the spine. non-fictionelectricity, optics, force, electrostatic, charg and capacity, electric currents, magnetic field, alternating current circuits, electromagnetic waves, radiation, conduction, dielectrics, geometrical optics, interference, heat radiation, diffraction

Used for measuring electric current. It works by using a compass needle to compare a magnetic field generated by the known current to the magnetic field of the Earth.A "compass rose" type of horizontal full-circle scale, with 4 0-90 unit quandrants. Balanced, free-floating needle. Located centrally wired to a vertical coil. Horizontal distance scales, one each side and perpendicular to the core. All mounted on polished wood base, equipped with 3 terminal posts. Materials: glass, wood, metal.elementary, physics, experiment, galvanonometer, ballarat school of mines, scientific instruments

An induction coil consists of two coils of insulated copper wire wound around a common iron core. One coil, called the primary winding, is made from relatively few (tens or hundreds) turns of coarse wire. The other coil, the secondary winding, typically consists of many (thousands) turns of fine wire. An electric current is passed through the primary, creating a magnetic field. Because of the common core, most of the primary's magnetic field couples with the secondary winding. The primary behaves as an inductor, storing energy in the associated magnetic field. When the primary current is suddenly interrupted, the magnetic field rapidly collapses. This causes a high voltage pulse to be developed across the secondary terminals through electromagnetic induction. Because of the large number of turns in the secondary coil, the secondary voltage pulse is typically many thousands of volts. This voltage is often sufficient to cause an electric spark, to jump across an air gap separating the secondary's output terminals. For this reason, induction coils were called spark coils. The size of induction coils was usually specified by the length of spark it could produce; an '8 inch' (20 cm) induction coil was one that could produce an 8 inch arc. (http://en.wikipedia.org/wiki/Induction_coil)A metal and plastic object on a timber stand. In an induction coil the distance between the plates is often used to measure the voltage of the spark since the air breaks down at 30 000 volts per centimetreballarat college of advanced education, scientific instrument, induction coil, scientific instruments, electricity

Galvanometers are an instrument used for detecting and measuring electric current. They had a magnetic needle moved by the magnetic field produced by coils carrying the current to be measured, and the earth's field had to be taken into consideration. They were used to detect current in either direction in telegraphy systems, and to test equipment.Post Office Galvonometer. A hinged polished timber case with three brass terminals at the top, and ring (handle) and a dial (0 to 70) with an indictor needle. The opened box reveals wires leading to the terminals with two compartments covered in blue woven material (possibly silk).telegraph works, galvonometer, scientific instruments

This item was most probably used at the Ballarat School of Mines. Pajari Instruments Ltd. grew from a partnership established in 1945 when the first EX-AX surveying instrument that provided accurate azimuth and inclination was made available to the diamond drilling industry. The partnership between Charles Trotter and George Pajari Sr. was known as Trotter-Pajari Instruments and the EX-AX Instrument was dubbed the "TROPARI" by the diamond drilling industry. Charles Trotter, a mechanical engineer, was also a marketing genius who developed substantial demand in Australia, Africa and South America in the 1940's and early 1950's. In fact the sales to each of these continents exceeded those to North America during those early years. Pajari is located in Orillia, Ontario, Canada and offer services and products that assist customers with their individual requirements. After the death of Charles Trotter in 1956, George Pajari Sr. with the assistance of his wife Hilda continued the business under the title of Pajari Instruments. George Sr. set most of the tenets that comprise our present Mission Statement. If it wasn't user friendly or if it had to have experts to operate it, that instrument design was doomed. If the customer wasn't getting good value in his opinion, manufacturing and repair procedures were examined to see where efficiency could be improved to cut costs without sacrificing Quality. George Pajari Jr and his wife Darlene assumed the reins of Pajari Instruments Ltd. in 1981 when George Sr. decided on semi-retirement. George Jr. brought the "client geologist's" perspective to the company. The company moved from Toronto to a 30 hectare (80 acre) site near Orillia shortly afterward. This site provided the high magnetic latitude earth field environment without magnetic pollution that is necessary for accurate compass setting. The park like setting of this location is a positive psychological benefit for our staff. George Sr. passed away in 2002 being preceded by Hilda only by 3 months, George Jr. continues at the helm of the company. With dedication from long term employees/contractors and third generation family members, Pajari Instruments Ltd. continues operations/new product development in Orillia. (http://www.pajari.com/about.html) Brass levelling compass in green velvet lined hinged timber box. Known as a Tropari - a single-shot, micro-mechanical borehole surveying instrument operated by a timing device. Borehole direction is measured from the earth's magnetic field. The Tropari provides both direction and inclination which can be used to define the attitude of the borehole at the survey depth. Regular surveys at intervals as the borehole progresses will allow a plot of the borehole to be drawn from the data. The Tropari is easy to use and maximizes profits by minimizing capital and operational costs. The Basic Survey Train Consists of: PDSI / Tropari Container, 6m (20 ft) Nonmagnetic Rods, Impact Foot, and Connector at Top. (http://www.pajari.com/tropari.html) A sticker on the lid of the hinged box states: "A.E. Parsons 107 Leicester St., Carlton 3053 Telephone 347 5844"scientific instrument, compass

Fob (or pocket) watches were developed in Europe in the 16th century and gained wide usage during the mid 18th century until World War 1 when the wristwatch was invented. These watches were designed to be carried in a small pocket and attached through the means of a 'fob' which could be a chain or made from a variety of materials such as leather. Their popularity peaked in the nineteenth century where they were an important part of middle and lower class society as well.This item is of social significance as fob / pocket watches were valued as an essential object in all levels of society. For some occupations, such as the railroads, it was a necessary tool of the job. Steel York Lever open face pocket / fob watch dated between 1940-1960. The dial has an inner pewter circle, outer minute divisions and a circular insert and hand to show the seconds. The numbers are finely edged with a black line and the hands are two coloured. The back of the watch is patterned with fine lines and three rectangle shapes. The words 'ANTIMAGNETIC' are on the front of the watch. Anti-magnetic watches began to be made at the beginning of the 20th century as mechanical watches were affected by magnetic fields. The 'lever' set on watches was a requirement for railroad watches. It required a two step process for the hands to be adjusted. The front dial of the watch has the words 'YORK LEVER', 'ANTIMAGNETIC' and 'MADE IN GERMANY'. flagstaff hill maritime museum and village, warrnambool, great ocean road, shipwreck coast, fob watch, pocket watch, watch, horology, time keeper, york lever, anti-magnetic, made in germany

Front side shows a map of australia with red lines of Magnetic Declination and blue lines depicting contours of the projected rate of declination change 2005 - 2010. The reverse side shows a world map with lines of magnetic declination at five-degree intervals. There are also three smaller Australian maps showing contours of "Total Field", "Horizontal Field (H)" and "Vertical Field (V)." Magnetic information was used extensively on the majority of maps produced by the Royal Australian Survey Corps, both topographic and aeronautical.Single A4 size sheet printed in colour on both sidesroyal australian survey corps, rasvy, fortuna, army survey regiment, army svy regt, geoscience australia

Mr John Wilson Gillie was born on the 31st of March 1864. On the 31st of July 1880 he was apprenticed for four years to J.J. Wilson and Sons, Nautical Instrument Makers of Sunderland. Following the apprenticeship he spent six months to a year as an ‘improver’ in Glasgow, and then started a new company ‘Wilson and Gillie’ in North Shields. At this time sail had just given way to steam and wooden ships to steel, and the railways were competing with colliers for the carrying of coal from the North East of England to London and the South. In 1858 only seven out of 44 shipyards on the Tyne were using iron, but by 1862 there were ten, employing around 4,000 men. These changes had a significant effect on nautical instrument manufacturers, as the magnetic compass for a wooden sailing vessel was very simple and required little in the way of compensation. For steel vessels much more was required and this was a period of great development, both in the compass bowl and the binnacle in which it was housed. In 1870 Sir William Thomson (later Lord Kelvin) designed his dry card standard compass, which completely replaced all previous designs. Wilson and Gillie started as agents for the Thomson compass, but later J.W. Gillie, using similar principles, redesigned the compass suspension and patented the ‘UNIT’ standard compass. It became popular with local shipowners and shipbuilders. In 1910 the firm of John Lilley and Son (which had been established in London in 1812), found themselves in financial difficulties and were saved with the help of John Wilson Gillie, who established, on the 8th of August 1911, a new firm of John Lilley and Son Limited. John Lilley and Son had been the sole London agents for Sir William Thomson, a very enviable position during this period, when the Thomson compass led the field. Unfortunately, Mr. Lilley had quarreled with the Glasgow company, who withdrew the agency and established their own branch in London (later to become Kelvin White and Hutton). On November 7th 1913, the firm of John Lilley and Son Limited of London amalgamated with Wilson and Gillie of North Shields, and after this date instruments manufactured by the two companies bore the name John Lilley and Son Limited of London and North Shields. During the 1930s many of the London nautical instrument makers were in difficulties, including John Lilley and Son Limited and Reynolds and Son, Dobbie and Clyde Limited, and Mr. J.W. Gillie arranged an amalgamation between these two companies. The new firm became Lilley and Reynolds Limited. In 1943, with estate duties in mind, the North Shields company was reconstituted and took the name of John Lilley and Gillie Limited, although the shareholders, directors and personnel remained unchanged In the early 1970s Lilley and Gillie developed close links with Observator in Rotterdam, who manufactured one of the first fully reliable transmitting magnetic compass systems. The Observator shareholders, Holland America Line, bought the share capital of John Lilley and Gillie Limited., but retained all the personnel and the directors. (See Links for more information)A significant item of early 20th century marine navigational equipment made by a leading manufacturer in the field from a company that is still producing marine navigational instruments today. John Lilleys company began in 1812 growing at a time when the transition of compasses from timber ships, to steel vessels. Compasses at this time required a method of compensation to allow their inclusion in steel vessels without magnetic deviation. This therefore was a period of great development, both in the compass bowl and the binnacle in which it was housed and the Lilley company were leaders in the field. Ships binnacle, wood with brass fittings, consists of 2 brass lamp holders, place for compass, Also has an inclinometer with a scale 40 to 0 to 40, one red and one green iron Kelvin compensation balls, one on each side of binnacle denoting port and starboard, a brass cylinder attached perpendicular at the rear for storing a Flinders Bar, 2 hinged cupboards containing adjustable wooden racks with drilled holes in them to hold iron Heeling error magnets.Textured brass plate attached to front stating "JOHN LILLEY & SON LTD (WILSON & GILLIE), NAUTICAL INSTRUMENT MAKERS, NORTH SHIELDS" . Inclinometer has "JOHN LILLEY & SON LTD (Wilson & Gillie) LONDON & NORTH SHIELDS" engraved. flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, binnacle, john lillie & son ltd, compass

The engraving possibly relates to William Piercy Austin No 618. Enlisted 17.8.14 in 5th Batt Machine Gun Sect age 22 years 3 months. Embarked for Egypt 21.10.14 then for Gallipoli and the landing. promoted to L/Cpl 9.5.15, hospital 1.9.15 with Dysentry and then Debility. Transfer to 57th Batt 24.5.16, embark for France 21.6.16, detached to 5th Div MG School, hospital 5.7.16 with Scabies, return to duty 21.7.16, posted on strength of 15th MG Coy 4.11.16, Promoted to Sgt 4.1.17, detached to 58th Batt, promoted to Lieut 29.1.17 and transfers to 60th Batt, hospital 19.2.17 with Trench Feet, while in England recovering hospital with Abcess, rejoin unit in the field, 8.8.17, transfer to 5th MG Batt 30.5.18, discharged from the AIF 21.6.19..1) Compass, Magnetic Prismatic. Serial No 97299 .2) Povat, leather, belt mounted .1) Engraved “15th MGC AIF Lt W. P. AUSTIN”compass, leather case, military

Greensborough Plaza at far left. Railway line running horizontally across centre of picture. Three colour photographs and one digital panorama created from two of the three images. Colour photographs originally located in a magnetic style album titled 'Greensborough Bypass 1990s 5' suffering significant degradation. No information contained in album or on reverse of photos except where noted. Relocated to archival photosafe storage.manatunga circuit, greensborough plaza, diamond valley united soccer club, greensborough

Grade 1 - Peter Whalley and Christopher Field, Eltham Christian School, 1982 From series of photographs from a magnetic photo album relating to the staff, students and activities of the Eltham Christian School which operated as part of the Eltham Christian Church at Nyora Road, Eltham. See also entries for each photograph.Colour Photographeltham christian school, nyora road, peter whalley, christopher field

Scott Taylor, Peter Whalley and Christopher Field (Yrs 1 and 2), Eltham Christian School, 1982 From series of photographs from a magnetic photo album relating to the staff, students and activities of the Eltham Christian School which operated as part of the Eltham Christian Church at Nyora Road, Eltham. See also entries for each photograph.Colour Photographeltham christian school, nyora road, peter whalley, christopher field, students, classroom

Primaries; Melina Bryans, Karen Whalley (front), Susan Field, Darren Watts (rear), Eltham Christian School, 1982 From series of photographs from a magnetic photo album relating to the staff, students and activities of the Eltham Christian School which operated as part of the Eltham Christian Church at Nyora Road, Eltham. See also entries for each photograph.Colour Photographeltham christian school, nyora road, students, classroom, melina bryans, karen whalley, susan field, darren watts

Yrs 1-3; Susan Field (3), Scott Taylor (2), Darren Watts (3), Peter Whalley (1), Christopher Field (1), Eltham Christian School, 1982 From series of photographs from a magnetic photo album relating to the staff, students and activities of the Eltham Christian School which operated as part of the Eltham Christian Church at Nyora Road, Eltham. See also entries for each photograph.Colour Photographeltham christian school, nyora road, students, susan field, scott taylor, darren watts, peter whaley, christopher field

Excursion to Fields family house under construction next to school early in year, Eltham Christian School, 1982. From a series of photographs (some cropped) from a magnetic photo album relating to the staff, students and activities of the Eltham Christian School which operated as part of the Eltham Christian Church at Nyora Road, Eltham. See also entries for each photograph.3 colour photographseltham christian school, nyora road, buildings, construction, field house

Easter play - At the Tomb; Karen Whalley, Peter Davison, Matthew Dance, Christopher Field, Fiona Berry, about April 1982 From a series of photographs (some cropped) from a magnetic photo album relating to the staff, students and activities of the Eltham Christian School which operated as part of the Eltham Christian Church at Nyora Road, Eltham. See also entries for each photograph.2 colour photographseltham christian school, nyora road, easter, play, karen whalley, peter davison, matthew dance, christopher field, fiona berry

Students Christopher Field and Peter Whalley with Mrs Adelaide Wilson, Eltham Christian School, 1982 From a series of photographs (some cropped) from a magnetic photo album relating to the staff, students and activities of the Eltham Christian School which operated as part of the Eltham Christian Church at Nyora Road, Eltham. See also entries for each photograph.colour photographeltham christian school, nyora road, christopher field, peter whalley, adelaide wilson

"Boy they sure work us hard at that school" Christopher Field asleep on a couch, Eltham Christian School, 1982 From a series of photographs (some cropped) from a magnetic photo album relating to the staff, students and activities of the Eltham Christian School which operated as part of the Eltham Christian Church at Nyora Road, Eltham. See also entries for each photograph.colour photographeltham christian school, nyora road, christopher field, sleeping

L-R: Adelaide Wilson (Teacher’s Aide), Chris Field (Craft), Helen Hillas (Primary Teacher), Chris Trinham (Pastor and Bible Studies), Gavin Phillips (Secondary Teacher), Alan Field (Electives), Anne Wilson (Secretary), Glenda Watts (Typing) From an album featuring a series of photographs (some cropped) from a magnetic photo album relating to the staff, students and activities of the Eltham Christian School which operated as part of the Eltham Christian Church at Nyora Road, Eltham. See also entries for each photograph.colour photographeltham christian school, nyora road, adelaide wilson, chris field, helen hillas, chris trinham, gavin phillips, alan field, anne wilson, glenda watts

Grade 2: Peter Whalley, David Prentice (back), Christopher Field , Eltham Christian School, March 1983 The Stokes family settled in this area of Eltham in the 1940s and were associated with the Eltham Christian Church. In the 1970s this church had met in temporary premises in Eltham. Lots of the original 1920s subdivision remained south of Nyora Road and a number of these lots were utilized for the Eltham Christian School, which was established by the Eltham Christian Church in 1981. The school operated on this site until 2000. The premises were owned by the Nillumbik Community Church who were in operation till November 2010 when the Eltham Baptist Church commenced a lease arrangement until the site was purchased by them in April 2012. The building is constructed of brick and timber with a balcony on two sides that looks over an expanse of grass. Sources: STOKES ORCHARD – AN INCOMPLETE HISTORY February 28, 2015 http://www.elthamhistory.org.au/ Australian Christian Church Histories - Eltham Baptist Church http://www.churchhistories.net.au/church-catalog/eltham-vic-baptist/ From an album featuring a series of photographs (some cropped) from a magnetic photo album relating to the staff, students and activities of the Eltham Christian School which operated as part of the Eltham Christian Church at Nyora Road, Eltham. See also entries for each photograph.Colour photographeltham christian school, nyora road, peter whalley, david prentice

Prep to Grade 2: Peter Whalley, David Prentice, Christopher Field at back (grade 2), Corey Giesbrecht (1) and Natasha Watts (Prep), Eltham Christian School, March 1983 The Stokes family settled in this area of Eltham in the 1940s and were associated with the Eltham Christian Church. In the 1970s this church had met in temporary premises in Eltham. Lots of the original 1920s subdivision remained south of Nyora Road and a number of these lots were utilized for the Eltham Christian School, which was established by the Eltham Christian Church in 1981. The school operated on this site until 2000. The premises were owned by the Nillumbik Community Church who were in operation till November 2010 when the Eltham Baptist Church commenced a lease arrangement until the site was purchased by them in April 2012. The building is constructed of brick and timber with a balcony on two sides that looks over an expanse of grass. Sources: STOKES ORCHARD – AN INCOMPLETE HISTORY February 28, 2015 http://www.elthamhistory.org.au/ Australian Christian Church Histories - Eltham Baptist Church http://www.churchhistories.net.au/church-catalog/eltham-vic-baptist/ From an album featuring a series of photographs (some cropped) from a magnetic photo album relating to the staff, students and activities of the Eltham Christian School which operated as part of the Eltham Christian Church at Nyora Road, Eltham. See also entries for each photograph.Colour photographeltham christian school, nyora road, peter whalley, david prentice, christopher field, corey giesbrecht

Grade 4: Susan Field, Darren Watts, Stephanie Giesbrecht, Eltham Christian School, March 1983 The Stokes family settled in this area of Eltham in the 1940s and were associated with the Eltham Christian Church. In the 1970s this church had met in temporary premises in Eltham. Lots of the original 1920s subdivision remained south of Nyora Road and a number of these lots were utilized for the Eltham Christian School, which was established by the Eltham Christian Church in 1981. The school operated on this site until 2000. The premises were owned by the Nillumbik Community Church who were in operation till November 2010 when the Eltham Baptist Church commenced a lease arrangement until the site was purchased by them in April 2012. The building is constructed of brick and timber with a balcony on two sides that looks over an expanse of grass. Sources: STOKES ORCHARD – AN INCOMPLETE HISTORY February 28, 2015 http://www.elthamhistory.org.au/ Australian Christian Church Histories - Eltham Baptist Church http://www.churchhistories.net.au/church-catalog/eltham-vic-baptist/ From an album featuring a series of photographs (some cropped) from a magnetic photo album relating to the staff, students and activities of the Eltham Christian School which operated as part of the Eltham Christian Church at Nyora Road, Eltham. See also entries for each photograph.Colour photographeltham christian school, nyora road, susan field, darren watts, stephanie giesbrecht

End of year concert, “The Peacock and the Willy Wagtail”; Fiona Berry, Karen Whalley, Peter Whalley, Susan Field, Eltham Christian School, 1982 The Stokes family settled in this area of Eltham in the 1940s and were associated with the Eltham Christian Church. In the 1970s this church had met in temporary premises in Eltham. Lots of the original 1920s subdivision remained south of Nyora Road and a number of these lots were utilized for the Eltham Christian School, which was established by the Eltham Christian Church in 1981. The school operated on this site until 2000. The premises were owned by the Nillumbik Community Church who were in operation till November 2010 when the Eltham Baptist Church commenced a lease arrangement until the site was purchased by them in April 2012. The building is constructed of brick and timber with a balcony on two sides that looks over an expanse of grass. Sources: STOKES ORCHARD – AN INCOMPLETE HISTORY February 28, 2015 http://www.elthamhistory.org.au/ Australian Christian Church Histories - Eltham Baptist Church http://www.churchhistories.net.au/church-catalog/eltham-vic-baptist/ From an album featuring a series of photographs (some cropped) from a magnetic photo album relating to the staff, students and activities of the Eltham Christian School which operated as part of the Eltham Christian Church at Nyora Road, Eltham. See also entries for each photograph.black and white photographeltham christian school, nyora road, concert, fiona berry, karen whalley, peter whalley, susan field, the peacock and the willy wagtail

End of year concert, “The Honey Hunt”; Karen Whalley, Susan Field, Peter Whalley, Jessica Doedens, Christopher Field, Eltham Christian School, 1982 The Stokes family settled in this area of Eltham in the 1940s and were associated with the Eltham Christian Church. In the 1970s this church had met in temporary premises in Eltham. Lots of the original 1920s subdivision remained south of Nyora Road and a number of these lots were utilized for the Eltham Christian School, which was established by the Eltham Christian Church in 1981. The school operated on this site until 2000. The premises were owned by the Nillumbik Community Church who were in operation till November 2010 when the Eltham Baptist Church commenced a lease arrangement until the site was purchased by them in April 2012. The building is constructed of brick and timber with a balcony on two sides that looks over an expanse of grass. Sources: STOKES ORCHARD – AN INCOMPLETE HISTORY February 28, 2015 http://www.elthamhistory.org.au/ Australian Christian Church Histories - Eltham Baptist Church http://www.churchhistories.net.au/church-catalog/eltham-vic-baptist/ From an album featuring a series of photographs (some cropped) from a magnetic photo album relating to the staff, students and activities of the Eltham Christian School which operated as part of the Eltham Christian Church at Nyora Road, Eltham. See also entries for each photograph.black and white photographeltham christian school, nyora road, concert, karen whalley, susan field, peter whalley, jessica doedens, christopher field, the honey hunt