Related to objects 450 and 451.Resistance decade box constructed from rectangular base of ferrous metal with black plastic top. Top displays five circular dials with three smaller circular dials on the right. Embossed plaque at front: 'J. L. WILLIAM / SCIENTIFIC INSTRUMENTS / SERIAL No 3012 / TYPE RR5S / MELBOURNE / AUSTRALIA' Engraved and filled white on top plate from left to right: 'ABSOLUTE OHMS AT 20 C / MANGANIN' Label reading 'PHYSICS PT 2 222 A4' Logo reading: 'J. L. WILLIAM / SCIENTIFIC / INSTRUMENTS / MELBOURNE / SERIAL No 3012' 'ZERO RESISTANCE / 0.006 OHM' Dials labelled underneath with unit measurements engraved and filled white.decade box, resistance decade box, j. l. william, electrical equipment, scientific instruments

Related to objects 451 and 452Resistance decade box constructed with a rectangular wooden body and black plastic top displaying five large dials and fifteen smaller dials. Unit measurements are inscribed beneath each dial.Left to right on top panel surrounding dials: 'INT / OHMS AT 20 C MANGANIN / PURCHASED BY UNIVERSITIES COMMISSION / J. L. WILLIAM MELBOURNE' Adhered label at center of top, between dials: 'Part 2 W B S' Long front side has an metal panel with paper label and PVC covering demonstrating setup that has 'SERIAL No 416' engraved along upper edge. j. l. william, scientific instruments, resistance decade box, electrical instruments, decade box

This object is believed to be associated with training at the Parkville Secondary Teaching College during the 20th Century.Related to objects 450 and 452This rectangular wooden resistance decade box features four large dials for controlling resistances. The dials are mounted atop a black plastic panel, each with a square base. Three smaller dials are mounted to the right of the large dials.Embossed plaque at front: 'J. L. WILLIAM / SCIENTIFIC INSTRUMENTS / SERIAL No 3960 / TYPE RB4DS / MELBOURNE / AUSTRALIA' Engraved and filled white on top plate from left to right: 'ABSOLUTE OHMS AT 20 C / MANGANIN' Logo reading: 'J. L. WILLIAM / SCIENTIFIC / INSTRUMENTS / MELBOURNE / SERIAL No 3960' 'ZERO RESISTANCE / 0.004 OHM' Engraved on back edge of top panel: 'SECONDARY TEACHER COLLEGE PARKVILLE' Dials are labelled underneath with unit measurements for resistance settings, engraved and in-filled white.j. l. william, decade box, electrical equipment, resistance decade box, scientific instruments

Balancing resistances in a varnished timber box. Black-painted metal lid holds four decade selector switches and three terminal posts. Lid attached with 6 knirled knobs. Instrument type 1370.Serial Number 142.scientific instrument, decade resistance box

Resistors 5 decade set, Type ^85. Black top panel eith elector knobs and terminal posts mpunted on polished wood box. scientific instruments, j.l. williams instruments, resistance box, decade box

Wooden box with brass top and 24 knobs (22 larger and 2 smaller) on the right-hand side. In addition there are two extra knobs on the right side of the top, as well as two removable oval access panels with handles on each of the ends.Stamped on top of box: a coat of arms 'HARTMANN OF BRAUN A/M' 'RICHTIG BEI / 20 / GRAD CELSIUS' increments for measurement On front side: Sticker labelled 'NATURAL PHILOSOPHY LABORATORY / NO 7 / UNIVERSITY OF MELBOURNE' Stamped on end of metal top: 'No. 2665'hartmann of braun, resitance decade box, resistance box, electical instruments, frankfurt, natural philosophy laboratory