POSTAL OFFICIALS AND BANKS. Mail Room sorters run considerable risk from disease bacilli. Many of them, also many Bank tellers gargle and suiff un Fluenzol as a safeguard. *
A new substitute for high-speed steel as a material for high-speed tools has been patented by a Sheffield metallurgist, and consists of eight parts by weight of forrochrome, 21 of nickel, 1.7 of silicon, and about 2.5 of aluminium. The ferrochrome contains 70 per cent, of chronium and 4- to 6 per cent, of carbon. Tho alloy of nickel, chromium, and silicon is first melted, nnd the,aluminium is then added, in a proportion that may range from 3 to 20 per cent, according to tho hardness required. Wifch no heat treatment, the toole cast are ready for use at once after grinding.
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Bibliographic details
Otago Daily Times, Issue 16965, 29 March 1917, Page 7
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130Page 7 Advertisements Column 5 Otago Daily Times, Issue 16965, 29 March 1917, Page 7
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