Book review

Handbooks No. 6 and No. 7, giving Safety Rules for the Installation and Maintenance of Electrical Supply Stations and Electric Utilization Equipment, respectively, are now on distribution through the Bureau of Standards, Washington. Price 10 cents each. These are published in small 5-in. by 7-in. paper covered pamphlets No. 6 comprising Part I the Grounding Rules of the fourth edition of the National Electrical Safety Code, while No. 7 consists of Part III and the Grounding Rules of the fourth edition of the National Electrical Safety Code. Publication dates, February 5 and March 12, 1926, respectively. Address Superintendent of Documents, Government Printing Office, Washington, D. C.