Washington DC: Government Printing Office 1915. 440 pages. 9 1/2 x 11 3/4 inches. Publisher's cloth with white printed titles (now hard to read) on spine. Corners glue reinforced. Two previous owner names on front flyleaf. Foldouts, illustrations. Generally bright and clean internally. Good. Cloth. 
An interesting summary of what was happening in the field in 1912. There are two major parts. The first, Central Electric Light and Power Stations. Part I: statistical. Chapter I: Introduction and General Explanations (including number of central electric stations, etc). Chapter II: Development of the Industry (many statistics and ways of comparing current demand). Chapter III: Primary Power Equipment - goes through the major types of equipment (steam engine, steam turbine, water power, hydroelectric stations, gas and oil engines). Chapter IV: Generating Equipment and Output of Stations (stations without generators, output of sttations in KW hours, etc). Chapter V: Line Equipment (street lamps, stationary motor services, subsidiary equipment). Chapter VI: Financial Statistics (of the industry). Part II: Technical. Far more technical than business focused, 60+ pages. The second major section is Street and Electric Railways, and is organized in a similar fashion.
This is the second report on these industries pursuant to requirements of the act of Congress of June 7, 1906. An intense amount of data useful to those who study these industries in their formative stages.