Published online by Cambridge University Press: 15 May 2009
1 Annual Report of Chief Inspector of Factories and Workshops (1933), p. 60; see also (1934), p. 63.Google Scholar
2 Jones, W. R., J. Hygiene (1933), 33, 307.CrossRefGoogle Scholar
1 In order to ascertain how far some of the A12O3 might arise from metallic aluminium present in fine dust from castings or shot, the material removed by magnet was analysed and found to contain decidedly less than 1 part of aluminium to 230 parts of iron. Hence the iron or steel present during the process may be ignored as a source of A12O3.