Thomlinson's Equivalent Paper Slide Scale
J. Thomlinson, Ltd.
3/4 x 23 x 3 1/4 in.
This slide scale converts various units of measure from English to metric. Thomlinson's Equivalent Paper Slide Scale is single sided with two slides. The lower left corner has been chipped.
Pre-computer: slide rule
Gwen Bell artifact and book collection
Gift of Gwen and C. Gordon Bell