Developments in engineering during the past decade, particularly as applied to marine construction, mining machinery and other purposes in which corrosion offers a serious problem,
In a recent discussion of Dr. Jeffries’ paper on tungsten, J. C. W. Humfrey, after taking exception to certain of the author’s ideas relative to
The writer has been unable to find much information relative to tests made to determine the effect of forging on the specific density of steel.
Using a Charpy Impact Machine, we have done considerable work on notch-bar testing and are farther at sea now than when we started. So far,
Brinell Hardness of Babbitt Bearings at Increasing Temperatures Brinell tests at progressively increasing temperatures are given for a representative lead-base and a representative tin-base Babbitt
The study of the condensation of zinc from its vapor was undertaken to shed light on certain problems encountered in large-scale electric zinc-furnace work recently
In the cyanide process, gold and silver are dissolved from crushed ore as double alkali-metal cyanides, from which they may be precipitated by such positive
Since the adoption by the U. S. Bureau of Standards several years ago of specifications for standard 100- and 200-mesh sieves, frequent requests have been
For some years past the principle enunciated in the discussion referred to has been known to the writer and demonstrated by him to be an
When Hugh Lee Pattinson discovered, in 1829, that the crystals formed during the slow cooling of molten lead were poorer, and the remaining liquid richer