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The Effect of Service Temperature on the Composition and Structure of Coatings Produced by Chrome-Calorising in Vacuum on the Nickel Alloys EP 109 and ZhS 6 KP
A review of:“Perceptions of Work”. By H. BEYNON and RM BLACKBURN.(Cambridge University Press, 1972.)[Pp. 179.] Price $3· 60 (cloth),£ 1· 80 (paperback).
Beobachtungen des Planeten (57) 10ter Grösse, 1) auf der Bilker Sternwarte, von Herrn Dr. R. Luther 2) auf der Berliner Sternwarte, von Herrn Dr. Bruhns 3) auf der Wiener Sternwarte, von Hern. Dr. Hornstein