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Updated: September 18, 2025
Aluminium, the now well-known valuable metal, present in clay, bauxite, and a variety of other mineral substances, is electrolytically deposited from a bath of alumina obtained by dissolving bauxite either in potassium fluoride or in cryolite. Aluminium is now coming into extended use in the construction of long-distance electric power transmission lines.
Kurt was also sitting up, a yard away from him, pink as ever, wrapped in blankets, and with an aluminium diver's helmet over his knee, staring at him with a severe expression, and rubbing his downy unshaven chin.
These German airships were held together by rib-like skeletons of steel and aluminium and a stout inelastic canvas outer-skin, within which was an impervious rubber gas-bag, cut up by transverse dissepiments into from fifty to a hundred compartments.
Thus it is not really necessary to use basic aluminium sulphate for mordanting wool, since the latter itself decomposes the normal or neutral sulphate of alumina on heating, an insoluble basic sulphate being precipitated in the fibres of the wool. The presence of other added substances, as cream of tartar, etc.
The metal known as calcium bronze, which is now so common, is an alloy of calcium, 0.75; aluminium, 0.20; and 0.05 of other metals and metalloids in varying proportions according to different patents. This alloy has all the useful properties of the finest steel with about one-fourth its weight, and is besides perfectly non-oxydisable and never tarnishes.
For example, the gravimetric determination of aluminium is accomplished by solution of the sample, by precipitation in the form of hydroxide, collection of the hydroxide upon a filter, complete removal by washing of all foreign soluble matter, and the burning of the filter and ignition of the precipitate to aluminium oxide, in which condition it is weighed.
Some idea of the labour involved in its construction may be gathered from the fact that this small and insignificant-looking instrument, fitted in its aluminium case, costs over L8. In the early days of aviation we frequently heard of an aviator losing his way, and being compelled to descend some miles from his required destination.
His back to Peabody, he rose, brought down his fist heavily upon the desk, and expounded oratorically to Haines: "What we can produce of aluminium hydrates, my boy, is problematical, but the South is in a hurry for it, and the duty must come down. It's got to come down, and I'm not going to do anything else until it does." The secretary stretched across the desk.
I filmed various sections here, then, having partaken of a little tea, I wended my way to the trenches. I kept low, as the tower of the Cathedral was in full view. I had previously covered the aluminium head of my tripod with a sandbag to prevent it glistening in the sun. As I drew nearer to the trench, which I could now see quite distinctly, more and more of St. Quentin came into view.
With a motor speed of 1,450 r.p.m., the vertical shaft at the forward end of the motor turns at 2,175 r.p.m., this being the speed of the two magnetos and the water pump. The lower vertical shaft bevel gear and the magneto driving gear are made integral with the vertical driving shaft, which is carried in plain bearings in an aluminium housing.
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