Los Angeles: Salisbury, Bradshaw & Taylor, 1925. 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, 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.