Lilly's spiral slide rule
Lilly's spiral slide rule, patent no.28603 (1912), 13 1/2" diameter
Details
- Category:
- Mathematics
- Object Number:
- 1914-401
- type:
- slide rule (spiral)
- credit:
- J.C. Stevens Auction House
Lilly's spiral slide rule, patent no.28603 (1912), 13 1/2" diameter