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Specimens are easily obtainable which are nearly pure and leave on treatment with acid only a slight siliceous residue. For the purpose of gravimetric determination, phosphoric acid is usually precipitated from ammoniacal solutions in the form of magnesium ammonium phosphate which, on ignition, is converted into magnesium pyrophosphate.
The chauffeur alighted from his car and drew the proprietor of the garage aside into his private office. "Billy," he said in a hoarse whisper, "this here baby carriage is got the oldest brand of dry battery ignition and one of the wires has come loose from the binding screw. It'll take about a minute and a half to fix." The proprietor nodded and passed over a dollar bill.
Its cycle is: First outstroke, gas and air sucked into the cylinder; first instroke, gas and air compressed into space; second outstroke, impulse due to ignition; second instroke, discharge of exhausted gases. When working at full power, it gets one impulse for every two revolutions; this seems to be a retrograde movement, but, notwithstanding, the advantages obtained are very great.
The calcium in a sample of dolomite weighing 0.9380 gram is precipitated as calcium oxalate and ignited to calcium oxide. What volume of gas, measured over water at 20°C. and 765 mm. pressure, is given off during ignition, if the resulting oxide weighs 0.2606 gram? !Answer!: 227 cc.
Gravimetric analyses involve the following principal steps: first, the weighing of the sample; second, the solution of the sample; third, the separation of some substance from solution containing, or bearing a definite relation to, the constituent to be measured, under conditions which render this separation as complete as possible; and finally, the segregation of that substance, commonly by filtration, and the determination of its weight, or that of some stable product formed from it on ignition.
The ignition of one youth, the finding of his work for one youth, is a worthy life task. The same possibility of service holds true for all kinds of workmen; these things are not alone for the artists and the craftsmen and the professions. There is one boy to linger about the forge of an artisan, after the others have gone.
The European continent is like an arsenal, a storehouse of explosives ready for ignition, and one spark will set the whole of Europe aflame, particularly at this time when the Balkan question is before the world. Even now war is raging furiously in some places, the blood of innocent people is being shed, children are made captive, women are left without support, and homes are being destroyed.
Now he would have to He paused in midthought, astonished at the abrupt acceleration of his heartbeat. "Well I'll be damned!" he said, and without further preamble transferred Zarathustra to the front seat, U-turned, and started back. The gasoline lantern had been moved out of the living-room window, but a light still showed beyond the panes. He pulled over to the curb and turned off the ignition.
Crucibles to be used in fusion processes must be made of materials which will withstand the action of the fluxes employed, and crucibles to be used for ignitions must be made of material which will not undergo any permanent change during the ignition, since the initial weight of the crucible must be deducted from the final weight of the crucible and product to obtain the weight of the ignited substance.
Ignition is by two high-tension magnetos, and a compressed air self-starting arrangement is provided. Two oil pumps are fitted for lubricating purposes, one of which forces oil to the crankshaft and connecting-rod bearings, while the second forces oil to the valve gear, the cylinders being so arranged that the oil which flows along the walls cannot flood the lower cylinders.
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