Artifact Details Title Number Sieve Machine using 16 mm film Catalog Number X87.82 Type Physical object Description The number sieve was built to solve mathematic problems of number theory. Surprisingly, it was built after its more advanced predecessors. Its main advantages were its ease of construction, transportation, and operation. The motor is missing. Date 1936 Manufacturer D. H. Lehmer Place Manufactured U.S. Identifying Numbers Model number Number Sieve Serial number None - prototype Dimensions 18 x 19 1/2 x 10 1/4 in. Category Calculator/electromechanical Credit Gift of D. H. Lehmer Lot Number X87.82 Related Records 102647620 Lehmer Bicycle Chain Number Sieve
