Stories Organisations Projects About Login

Slide, Grayson Test plate with case

From the Collection of The Ed Muirhead Physics Museum Level 2, The School of Physics, David Caro Building (192) Corner of Elgin and Swanston Streets The University of Melbourne Parkville VIC

Description
Test plate rectangular glass slide with rulings under circular cover glass within yellow circle and brown border enclosed in red hinged box with blue lining. Described as “A sample Microscope slide - Test plate with rulings from 30,000 to 120,000 per inch”. This is the only surviving ruling reaching up to 120,000; hence is both unique and valuable.
Size
Slide: H0.2 x L7.5 x D3
Object Registration
42.2
Inscriptions & Markings
Labels on slide: “Test plate 10,000 to 120,000. Ruled by H.J. Grayson, Melbourne”. No of lines per inch Band 1-10,000 2-20,000”. On label on side: “No of lines per inch Band 3 -30,000 4 - 40,000 5-50,000 6-60,000 7-70,000 8-80,000 9-90,000 10-100,000 11-110,000 12-120,000”
Last updated
16 Dec 2014 at 12:26PM