Audels engineers and mechanics guide
Publisher: Audels
Published: 1938
Place of publication: New York
Format: Flexible Boards
Description: This is the complete set in matching black pebbled flexible boards with bright gilt to spine and red inked  edges to textblock as per design. Though I have stated 1938, the books show copyright dates from 1938-1940 with three being from 1938, two from  1939 ,and three from 1940. Billed as "a progressive illustrated series with questions, answers,  calculations covering modern  engineering practice  specially prepared for for all engeneers, all mechanics, and all electricians. A practical  course of study and reference ..."