✦ LIBER ✦

Report No. 351. Full scale wind tunnel tests of a propeller with the diameter changed by cutting off the blade tips: by Donald H. Wood. 25 pages, illustrations, quarto. Washington, Government Printing Office, 1930. Price fifteen cents

Book ID: 104128168
Publisher: Elsevier Science
Year: 1930
Tongue: English
Weight: 63 KB
Volume: 210
Category: Article
ISSN: 0016-0032
DOI: 10.1016/s0016-0032(30)91457-3

No coin nor oath required. For personal study only.

✦ Synopsis

lighting not only successfully challenges the sun and makes the indoor world independent of it, but it is much more practicable. As to cost, it is a very small part of the cost of production or of living. Adequate natural sunlight for health as well as for vision cannot be obtained in most of our indoor world at any cost."

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