Geneva, Illinois: Riverbank Laboratories 1918. First Edition. ,46 p. illus., tables, diagrs. 28.5 cm. One of 200 copies printed per printed limitation statement. Provided in the originally issued Riverbank Laboratories button and string flapped manila envelope with matching limitation number printed in red upper right corner (dusty, minor creasing/wear). Stiff tan publisher's wraps with cover titles duplicating title page. A very nice copy, stapled at spine, staples rusty, and light staining transferred from envelope tie. Near Fine. Wraps. 
A restricted publication not publically available when issued, it appears in a few institutional collections, but is rarely found on the market. '[Friedman extends the fragments thus obtained [in publication 16, Methods for the Solution of Running-Key Ciphers] by working the one text against the other.' Authorship attribution from Galland. [ Methods and examples of Deciphering]
See J.S. Galland, An Historical and Analytical Bibliography of Cryptology, page 67-68. See also Kahn, The CodeBreakers, 1996, p375, Shulman, An Annotated Bibliography of Cryptography, 1976, p82.