4.2 Years 1900-1909
Number of slide rules: 14.
The early K&E Mannheim slide rules began to compete with their European counterparts. Inverse, folded, and cubic scales began to become available on the European slide rules. Manufacturers appear to have experimented with a variety of standard scale arrangements this decade in search of more efficient computational power. See, for example, the Dietzgen rules with their special “B” scales (1762-B), as well as the inverse scales and “triplex” scale arrangements on the Kolesch slide rules. The “log-log” scales, invented nearly a century earlier, are re-introduced by K&E on their duplex models at the end of this decade.
Some notable technical developments: Zeplin first flight; Wright Brothers and Kitty Hawk flights; Einstein’s development of special and general relativity; Ford’s Model T automobile.
Year | Maker | Model | |
---|---|---|---|
c.1900 | K&E | 4041 |
![]() |
c.1900 | K&E | American |
![]() |
1900-1914 | K&E | 4054 |
![]() |
c.1901 | K&E | 4041 |
![]() |
1902-1912 | Dietzgen | 1765 |
![]() |
1903 | Faber | 350 |
![]() |
c.1904 | Dietzgen | 1762-B |
![]() |
c.1905 | Dietzgen | 1762-B |
![]() |
1905-1907 | Dietzgen | MultiplexProto |
![]() |
1905-1911 | Kolesch | 2574 Mannheim |
![]() |
1905-1911 | Kolesch | 2713 Stadia |
![]() |
1905-1911 | Kolesch | 2832 Triplex |
![]() |
1909 | Stanley | Fuller’s Calculator Model No. 1 |
![]() |
1909-1914 | K&E | 4056 |
![]() |