A study of Illinois coals : with a new method for determining their calorific value . actory. The results, inorder to be at all reliable, must be increased by fifteen per cent,as Scheurer-Kestner determined (G2). It was in order to bringabout a more complete combustion that Pj >f. Parr, in 189G, (CI)added some sodium peroxide to the mixture used in the Thompsoncalorimeter. The combustion -as complete and more uniform read-ings -ere obtained. He obtained an increase of ^CO to 400 13• by using one-half gram of sodium peroxide as stated. Thisincrease was due to the absorption of carbon di
A study of Illinois coals : with a new method for determining their calorific value . actory. The results, inorder to be at all reliable, must be increased by fifteen per cent,as Scheurer-Kestner determined (G2). It was in order to bringabout a more complete combustion that Pj >f. Parr, in 189G, (CI)added some sodium peroxide to the mixture used in the Thompsoncalorimeter. The combustion -as complete and more uniform read-ings -ere obtained. He obtained an increase of ^CO to 400 13• by using one-half gram of sodium peroxide as stated. Thisincrease was due to the absorption of carbon dioxide and waterformed by tho combustion. Even if a perfect combustion is ob-tained, still the errors involved are numerous and the method should be need if it can possibly bo avoided. If sodium peroxide aids the combustion, vrtiy not use italone? It can be wed alone, and after numerous experiments asregards apparatus, manipulation, and condition of coal and sodiumperoxide, the calorimeter, of r/hich a sketch Kid description are£iven bclor;, .vas devised by Prof. 44. The outor jacket of this calorineter is of the same kindof notorial as that of Dr. Abaters apparatus, namely of indur-ated fiber. The jar in a nickel plater), copper or brass can, largeenough to hold two liters of water. Inside this can are placed,the brass stirrer I, which is run by a water-motor, the themone-ter H, the brass stand G, and the bonb A, also of brass. Thebomb, as -re see, consists of a piece of brass tubing with a threadcut into oach end. At the lovrer end is the solid plug B, at theupper is the fitting which has the contrivance by noans of whicha red hot wire, about one quarter of an inch lone, c&n ke droppedinto the bonb. This is so arranged that when P is pressed down-ward, D is lowered enough to allow the wire to pass between it andC, aft or havinc cone down tlie channel K. The spring at E servesto brine D back to the original place when tho hand is renovedfrom P. The staiid G,
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectcoal, booksubjectthes
