Perry calculating slide rule and case

Made:
1910-1911 in Manchester
manufacturer:
A G Thornton Limited

Improved Perry calculating slide rule, 10 inch; in case, scale of inches and fiftieths on bevel edge, special cursor of aluminium and glass with pointer attached for rapidly calculating engine diagrams, etc., cursor has broken hair line for easy reading, double faced with celluloid log-log scales along the whole length and bottom edges; printed list of constants etc., pasted at back

Details

Category:
Mathematics
Object Number:
1911-186
type:
slide rules
credit:
A.G. Thornton Ltd.

Parts

Case for improved Perry calculating slide rule

Case for improved Perry calculating slide rule

Case for improved Perry calculating slide rule, 10 inch

Object Number:
1911-186 Pt1
type:
instrument case
Improved Perry calculating slide rule

Improved Perry calculating slide rule

Improved Perry calculating slide rule, 10 inch; in case, scale of inches and fiftieths on bevel edge, special cursor of aluminium and glass with pointer attached for rapidly calculating engine diagrams, etc., cursor has broken hair line for easy reading, double faced with celluloid log-log scales along the whole length and bottom edges; printed list of constants etc., pasted at back

Measurements:
overall: 10 mm x 277 mm x 42 mm, 0.076 kg
Materials:
brass (copper, zinc alloy) , ivory , paper (fibre product) , aluminium , glue and glass
Object Number:
1911-186 Pt2
type:
slide rules