File:Explosives (1917) (14593209487).jpg

Identifier: explosives01mars (find matches)
Title: Explosives
Year: 1917 (1910s)
Authors: Marshall, Arthur, 1873-
Subjects: Explosives
Publisher: Philadelphia, P. Blakiston, 1917
Contributing Library: NCSU Libraries
Digitizing Sponsor: NCSU Libraries

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place in a portion of thetower. Guttmanns hollow -tone-ware balls give a very good result andhave the merit that no special care i- required in filling them into the tower.There are many other form- of -tone-ware filling for towers procurable. Inorder to effect complete absorption of the oxides of nitrogen two or threetower- are necessary. A -low stream of water i- run into tin- la-t one anddistributed uniformly over the cross-section of the tower. A weak nitric-acid runs out at the bottom of tin- tower ami i- raised from there by meansof a continuously acting appliance to the top of the next one. A- weaknitric acid attack- all the common metal-, glass and stone-ware are the onlymaterial- that can be u-ed for the construction of the pipes and vessels. Forraising the liquid to the tops of the towers -mall Ke-tner automatic eggsmade <»f Btone-ware can lie u-ed. but as the quantity is very -mall it i- betterto use a -mall appliance, which cau-e- the acid to raise it-elf and works on
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128 EXPLOSIVES the well-known principle of making the ascending column of liquid lighterthan a descending one by mixing it with ah*.1 From the base of a tower aglass tube descends a distance equal to about half the height of the tower.It tlu-n turn- through 180 . and a small distance beyond the bend compressedair i- injected in through a number of small holes. When once the rate ofadmission <»f the air has been adjusted the appliance works continuously andrequires very little attention. The mixture of acid and air should be deliveredinto the top of the tower below the cover, so that the air cannot carry awaypart of the acid fumes. This air also serve- a useful purpose.in that it renewsthe Bupply of oxygen, which has been partially exhausted by the oxidationof the nitrous gases. The greater pari of tie absorption of the gases takesplace in the middle tower or towers : in the first tower the acid isstrengthened up slightly to near the limit theoretically possible, namely.68 per cent

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