Published by Salisbury, Bradshaw & Taylor, Los Angeles, 1925
Signed
39p. + large foldout map, numerous site photos, laid in is a typed letter of transmittal from the Western Concrete Pipe Company signed by company secretary J. M. MacAdams, wraps lightly worn else very good in wraps. LA infrastructure such as abutments and old dug-up pipelines. Close-up photos record longevity of "poor" concrete and "sound" concrete in alkaline conditions.