Jladium is now used to photograph defects in steel posts and beams up to 1,0 inches in thickness. Exposures require from 20 hours to 30 hours, this length of time being necessary for the rays to pass through the steel and register al! imperfections on the film
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Bibliographic details
Hawke's Bay Tribune, Volume XXIV, Issue 234, 15 September 1934, Page 7
Word Count
47Page 7 Advertisements Column 3 Hawke's Bay Tribune, Volume XXIV, Issue 234, 15 September 1934, Page 7
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