Title
Lehmer Number Sieve, bicycle chainCatalog Number
102622622Type
Still imageDescription
B&W image of D.H. Lehmer's bicycle chain number sieve. The chains are on an axle which is supported by a "sawbuck" of 2x4's. The driver motor is on a shelf below the chains.Identifying Numbers
| Other number | #109 | Verso pencil |
Dimensions
overall: 10 in x 8 inCategory
PhotographCredit
Courtesy of Gwen BellLot Number
X7413.2015
Related Records
| 102622804 | Lehmer - Bicycle Chain Sieve |