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Chemistry and Physics. 65 
products could escape. (2) When diamond is burned at a high 
temperature in pure oxygen, the carbon dioxide formed has oxidiz- 
ing properties which it does not possess when produced by the com- 
dark red heat; while one equivalent of hydrogen removes at the 
same temperature only 7:96. If the equivalent of O be 8, then 
known 
weight of zinc in HCl) and the water formed, the ratio differs 
granular CuO over a length of 80 cm. heated to redness, the ratio 
mperature, 7°90 to 7°93; if 
contains more oxygen than that produced by oxidizing the lower — 
