Vintage Engineering Instruments,INC., PERU, INDIANA SLIDE RULE
This famous slide rule solves problems in Multiplication, Division, Proportion, Squares and Square Roots, Cubes and Cube Roots, Reciprocals, etc.,instantly. Reverse side shows equivalents, etc.
Accurately calibrated White Face on Well Seasoned Lightweight Hardwood.
This 10 3/8" long wooden slide rule looks and works fine, No box.
Centre piece is movable.
Product ref is: Engineering Instruments - No Model number (Lawrence 10-B) - c1947
Made in USA - Peru, Ind.
Front Scale
A [ B, CI, C ] D, K
Back: Conversion Chart
Note: Front side painted, Back screened on bare wood.
A bit of history on the origin of the slide rule manufacturer:
The original company was known as Lawrence Engineering Service, 1935 - Wabash, Indiana, 1938-1947 - Peru, Indiana
A 10 person shop owned by George Lee Lawrence and Vivian C. Lawrence
After a divorce became Engineering Instruments, Inc. 1947-1967 Peru, Indiana
Owned by Vivian C. (was Lawrence) Bozarth and Frank H. Bozarth
Brief history
1901 - George Lee lawrence born in Chicago, IL.
Pre 1935 - Lawrence Slide Rule Company - George Lee Lawrence makes Photographic Slide rules in Chicago.
1935 - Lawrence Engineering Services was set up in Wabash, Indiana
1938 - Moved to nearby Peru, Indiana (10 man shop run by Ed Snyder)
c1940 - A glass magnifier was developed
c1942 - OEM supplier to Post (model 1446D) during WWII, when Japanese importation was halted.
c1943 - Injection molded plastic cursor replaces fragile glass magnifier
1947 - A divorce settlement gives company to wife Vivian, briefly called Lawrence Engineering Company
c1948 - Vivian marries Frank C. Bozarth, forms Engineering Instruments, Inc. in Peru, Indiana
c1960 - Engineering Services OEM's the 77A plastic American Log Log (Acu-math 1500)
1967 - Company building burns down, Engineering Instruments ceases to exist.
1976 - George Lee Lawrence dies
reference: http://sliderulemuseum.com/Lawrence.htm
Shipping from Johannesburg: By insured post R40.00 or courier or can be collected JHB-North after EFT payment has been received, see shipping tab.
PAYMENT: Within 48 hours preferred, maximum 7 days.
Combined purchases from the same origin will be sent as one parcel thus reducing shipping costs,
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