Technical Paper, Issue 188

Front Cover
U.S. Government Printing Office, 1922 - Mines and mineral resources
0 Reviews

What people are saying - Write a review

We haven't found any reviews in the usual places.

Other editions - View all

Common terms and phrases

Popular passages

Page ii - Mines, in carrying out one of the provisions of its organic act — to disseminate information concerning investigations made — prints a limited free edition of each of its publications. When this edition is exhausted, copies may be obtained at cost price only through the Superintendent of Documents, Government Printing Office, Washington, DC The Superintendent of Documents is not an official of the Bureau of Mines.
Page vii - ... scraped off (under the abrading action of irregularities or grit in the bore). Powder fouling, because of its acid reaction, is highly corrosive; that is, it will induce rust and must be removed. Metal fouling of itself is inactive, but may cover powder fouling and prevent the action of cleaning agents until removed, and when accumulated in noticeable quantities it reduces the accuracy of the rifle.
Page v - Department 1 of the Army says that probably more rifles are ruined by improper preparation for storage than by any other cause ; and the problem, though primarily military, touches the interest of every owner of a firearm. The importance of this study is not, however, limited to the users of firearms. The fundamental problem proved to be corrosion under oil films; this differentiates after-corrosion sharply from the ordinary corrosion of clean iron and steel surfaces. It...
Page 13 - Corrosion tests of rifles fouled with service cartridges, then cleaned 'with water alone, and with soap and water, showed that such treatment completely prevented after-corrosion.
Page vii - Marshall,8 an authority on explosives, when he says " — black powder * * * has been able to hold its own in certain fields in 'consequence of its advantages : * * * and the noncorrosive nature of the residue which it leaves in the gun.
Page 21 - The advantages of noncorrosive primers and the principles governing this composition now seem quite plain. General technical application should follow.

Bibliographic information