4.9 Lawrence / Engineering Instruments, USA
Lawrence Engineering Service, later named Engineering Instruments, Inc., began in Chicago (as The Lawrence Slide Rule Company) and quickly moved to central Indiana as its base of operation, first in Wabash, Indiana, in 1935 and later to the town of Peru in 1938. It was known for its cheap rules with sufficient accuracy that were often used by students for introduction to the basic scales and operations. In addition to standard Mannheim-style rules, the company also manufactured specialty rules for use in business, such as for lumber, printing, and engraving applications and many others. A major fire destroyed the entire operation on 5 July 1967 at which time the business was ended.
Total number of Lawrence or Engineering Instruments slide rules in the collection: 9.
|8-B||1935-1938||L||wd||7.50||no||Lawrence Engineering Service, Wabash, IND.; overall good shape; clean table on back|
|10-C||1935-1938||L||wd||5.00||yes||Lawrence Engravers / Photographers Proportion Calculator; Wabash, IN|
||1940||L||wd||10.00||yes||Lawrence Engineering Service; Peru, IN; plastic magnifier cursor|
||1942||L||wd||10.00||yes||good condition; Peru, IN|
||1946||L||wd||3.75||yes||Lawrence Lumber Calculator; Peru, IN|
||1946||L||wd||6.50||no||Lawrence Printer’s Proportion Rule; Peru, IN|
||1950||L||wd||10.00||no||Peru, IN; no cursor|
||1960||L||wd||10.00||yes||Rule in good condition; blue case; instructions;original box|
||1960||L||wd||10.00||no||Rule in very good condition|