Chlorine in Peroxide of Manganese. 



m 



stopcock of the bladder, and thrust through a perforated cork ; 

 this cork fitted accurately the mouth of a glass globe, from 

 which a quill passed to the mercurial trough. The cork being 

 pushed up, I applied a taper to the stream of gases issuing from 

 the tube, but they would not inflame. A jar was then filled 

 with the mixture over warm water, and a lighted taper plunged 

 into it ; the taper of course, burned brilliantly, but there was 

 no explosion. 



A. The bladder and stopcock containing the mixed gases. B. The 

 thermometer tube cemented into the stopcock, and passing through the 

 cork of the globe. C. A globe, to the mouth of which a cork was fitted. 

 The cork being slipped upon the tube, the stream of mixed gases was 

 fired, and the tube and cork then introduced to the globe. D. The quill 

 going from the globe to the mercurial trough. E. The trough. F. A gas 

 jar to receive the elastic fluid evolved. 



I then put a mixture of salt, manganese and sulphuric acid 

 into a cast-iron bottle, and collected the gas evolved. When 

 the apparatus above-mentioned was used, the gases burned with 

 a yellow flame, and water, impregnated with muriatic acid, was 

 produced, a great excess of chlorine and of oxygen passing over 

 into the jar, the mercury absorbing the former, and calomel 

 being produced. 



I next mixed equal volumes of oxygen, hydrogen, and 

 chlorine, and using the same apparatus, exactly the same 

 results were obtained. I never could detect any chloric acid 

 or euchlorine. 



Mr. Mac Mullen says next, that when muriatic acid gas is 

 passed over heated oxide of manganese, the same inflammable 

 gas is produced. On repeating this experiment with a series 

 of tube apparatus, and receiving the elastic fluid produced 

 over water heated to 100°, I got nought but chlorine, and 



