Pulp and paper magazine of Canada . tilled with caustic alkaliand colic, sulphuric acid wax passed for 10 min. throughone of tin condensers, cooled to o (. It contained— gr. , or gr. SO,The same with two oilier tubes made—Air passed through Jo min. gr. BaSO, equal to gr. passed through 20 min. gr. BaSO, equal to gr. SO,.In pursuit, every available apparatus B was now driedand rinsed with water, without passing gas or airthrough. The solutions after precipitating withbariumchloride and hydrochloric acid gave the follow- n suits— Tube Xo. 1
Pulp and paper magazine of Canada . tilled with caustic alkaliand colic, sulphuric acid wax passed for 10 min. throughone of tin condensers, cooled to o (. It contained— gr. , or gr. SO,The same with two oilier tubes made—Air passed through Jo min. gr. BaSO, equal to gr. passed through 20 min. gr. BaSO, equal to gr. SO,.In pursuit, every available apparatus B was now driedand rinsed with water, without passing gas or airthrough. The solutions after precipitating withbariumchloride and hydrochloric acid gave the follow- n suits— Tube Xo. 1 234 gr. BaSO, ; 5 Prom the above tests we can now conclude:1. The aqueous extract of unused condenser luluscontains substances which become precipitated withbariumchloride. Whatever nature these substances arewas not determined. The respective quantities can heconsidered as constant. gr. SO,. Tests madelater on. gave practical the same 2. When air is passed through an ordinary washbottle, filled with sulphuric acid, some of the latter istaken away with the Lias current. The test with the pure so gas was now repeated, bulinstead of using a sulphuric acid wash bottle to dry thegas, a tube tilled with phosphorus pentoxide was em-ployed. Again about 2 lits. of the gas passed throughthe condenser. The resulting amount of , orSO was— gr., , ,„• gr. S03. During another experiment with SO, oxygen was in-i roduced Pound gr. BaS04, or 0. 5 gr. so. These last two tests show that the sulphurous acid(even when mixed with air) would have no influencewhatever on the final result, when determining sulphur-trioxide in furnace <ras. It was. therefore, at last onlynecessary to answer the above given question 1 (b),whether the condensation of so is complete or order to gel an idea aboul the prevailing conditionsin this respect, the followi
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