IOjj uniform dosage. On t h e other hand, t h e a m o u n t of with a greater tendency t o decomposition t h a n t h e air-space in t h e containers does not appear t o be a n y others. Several tests were made for nitrites in t h e factor in t h e deterioration, since some tablets t h a t deteriorated tablets, which might show decomposition, showed a jo per cent deterioration were stored in b u t none were found. B u t if decomposition occurs, securely stoppered tubes which allowed only a very

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... t is more likely t o be an oxidation process t h a n a resmall proportionate air-space, a n d freshly opened duction, hence a failure t o find nitrites proves nothing. tubes showed t h e same deterioration a s had t a k e n T h e work on t h e isomerides of nitroglycerin is too place in bottles furnishing a relatively large air-space. recent t o prove whether it is a factor in t h e deteriora-