6.1 Most Recent Additions

Of the 431 slide rules presently in the collection, the most recent 25 additions are shown below in reverse chronological order of their acquisition.

Maker	Model	Year
US Naval Gun Factory	Spring Slide Rule	1939
K&E	8858	1941
The Spirule Co.	Spirule	1959
FXR	Radio Transmission Line Calculator & Smith Chart	1950
Relay	505	1960
Richardson	812	1922
Hemmi	2664	1946
K&E	N4053-3	1923
Richardson	Direct Reading Pocket	1912
Richardson	Direct Reading Pocket	1912
Richardson	Direct Reading Pocket	1911
Richardson	Direct Reading Slide Rule	1910
Richardson	Direct Reading Slide Rule	1909
Cox & Stevens	No. 1066	1943
Hemmi	150	1936-40
Hemmi	32	1931-33
Hemmi	269	1969
K&E	Short Baseline Triangulation Slide Rule	1940
Shanghai Slide Rule Factory	Flying Fish 1018	1975
Dietzgen	1765	1898-1902
Felsenthal	Aerial Dead Reckoning Computer	1942
KHH	1418/111	1936
K&E	68-1100	1962
K&E	4108	1942
K&E	68-1100	1974