216 ANNUAL KECORD OF SCIENCE AND INDUSTRY. 



that ozone may be obtained in sufficient quantity for lecture- 

 room demonstration and other purposes by simply blowing 

 the heated air in contact with the margin of an ordinary 

 Bunsen gas flame, with the aid of a glass tube, into a suitable 

 receiver. If the product thus obtained is then tested with 

 one of the ordinary reagents used for detecting ozone viz., 

 iodide of potassium, acetic acid, and starch the blue colora- 

 tion of the iodide of starch at ,once appears. At the time 

 Loew's announcement met with some objectors, who sought 

 to explain the phenomenon by assuming that the subsequent 

 reaction was to be ascribed to the formation of small quanti- 

 ties of partly oxidized nitrogen products formed during com- 

 bustion. The subsequent discoveries of Pincus and Bottger, 

 however, appear to have settled the question by confirming 

 the conclusion of Loew. 



CARBONIC OXIDE IN TOBACCO SMOKE. 



Dr. Krause has found that tobacco smoke contains a large 

 quantity of carbonic oxide, and he attributes the injurious 

 after-effects of smoking to this poisonous gas, some of which 

 necessarily descends to the lungs, and produces more or less 

 injury. According to Krause, the after-effects are more po- 

 tent the more inexperienced the smoker, and he ascribes to 

 the carbonic oxide the unpleasant results of the first attempts 

 at smoking rather than to nicotine alone. 12 A, April 6, 

 1875,456/ 



MELLILOTOL. 



Dr. T. L. Phipson publishes an account of what he calls 

 mellilotol, as being an acid oil slightly soluble in water, sol- 

 uble in alcohol and ether, and transformed into mellilotic 

 acid by the action of potassa. It is endowed with most fra- 

 grant odor that of new-mown hay. He obtained it by the 

 distillation of Mellilotus officinalis with water, and isolating 

 from the distillate by means of ether. The plants may be 

 gathered while in full bloom, those growing in sheltered 

 places and flowering in August being richer in product. 

 About 0.02 per cent, of pure mellilotol was obtained from the 

 dried plant by distilling the stalks, leaves, and flowers to- 

 gether. 



Mellilotol, according to Dr. Phipson, is the starting-point 



