Physical description

8 micrometer (microscope) test slides stored in wooden box with storage slots. Cardboard label inside box: “From Melbourne University Physics Dept Museum. Probably Grayson trials or William Stone” “ Microrulers/W S” on lid

Inscriptions & markings

On box: “Micronmemters W.S.” On 43.2: unlabeled, with glass rectangle 30x10mm cemented on microslide On 43.3: red and gold emblem/”Micronmemter 100 and 1000 in an inch” On 43.4: “Depth 0.10 mm; contents of 4 squares 0.001 C.mm ” On 42.5: unlabeleed square 9 x 7 mm. On 43.6: “1/100 1/500 inch” On 43.7: “200/inch 500/ inch 1000/ inch 2000/ inch” On 43.8: “1/100 1/500 inch” On 43.9: “Heavy lines up to 70,000. Higher Lines broken up” : “120X”(??)