The chemistry of portland cement: by Robert Herman Bogue.572 pages, illustrations, 15 × 24, cm. New York, Reinhold Publishing Corp., 1947. Price, $10.00

✍ Scribed by R.H. Oppermann

• Publisher: Elsevier Science
• Year: 1948
• Tongue: English
• Weight: 81 KB
• Volume: 245
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/0016-0032(48)90024-6

✦ Synopsis

btlt more telling disadvantages, a lack of flexibility and a higher first cost and fixed charges for the necessary plant and equipment.

The Diesel-electric, which is the newest type in major use, has proved its value both in switching and road operation. Several different types are commented upon briefly.

The seventh chapter presents the heart of Mr. Kiefer's paper, in that he discusses the different types of motive power in relation to the fundamentals which he has previously: defined. Availability of motive power has been the subject of several tests made on the New York Central of steam-engines and Diesels under comparable conditions of service, both passenger and freight. For costs evaluation there are offered in considerable detail actual and estimated annual operating costs for four different locomotives. In respect to capacity for work the author presents several charts showing power characteristic curves for various types of equipment. Performance efficiency is treated in two ~arts--over-all thermal efficiency at drawbar referred to fuel and over-all performance efficiency.

The concluding chapter presents a table summarizing the author's findings as to the relative evaluations of various motive-power types. It has been necessary to estimate the position of the gas-turbine and steam-turbine locomotives since few data are yet available. The tables indicate that on the majority of factors the straight electric is best, the Diesel electric is median and the reciprocating steam locomotive is last. The whole paper is a wellordered presentation of the fundamentals to be considered in evaluating motive power and it forms a significant contribution to an understanding of |he relative position of the lypes now in use.