450 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



longed puff exactly at right angles to the top of the chimney. 

 The draft thus created draws the flame away from the wick, 

 when the carbonic acid immediately below the departing 

 flame also extinguishes the red-hot charred end of the wick. 

 18 A, January 5, 1872, 402. 



REPORT ON KEROSENE. 



The services of Professor Chandler, in his official connection 

 with the Board of Health of New York, in the investigation 

 of the chemistry of adulterations, in the past, are well known 

 and appreciated. He has now added to the series of re- 

 searches in this direction by the publication of a report upon 

 petroleum as an illuminator, in which he shows the advan- 

 tages and perils which attend its use, with special reference 

 to the prevention of the traffic in dangerous kerosene and 

 naphtha. We commend this valuable memoir, which belongs 

 to the report of the Board of Health of New York for 1870, 

 to the attention of all persons interested in the subject. He 

 thinks that the only way to protect the public against these 

 dangers is to educate it as to the properties of petroleum, 

 this being done most effectually through the newspapers, 

 which are published in every city and village, and by the 

 issue of clear statements in regard to it in the form of circu- 

 lars. The experiment has been successfully tried in New Or- 

 leans and some other places ; and when the people are fully 

 informed in regard to the dangers connected with the use of 

 the compounds of naphtha, dealers in them will go out of 

 business for want of purchasers. He also thinks that the 

 Legislature of each state should pass stringent laws, with 

 severe penalties, for the regulation of petroleum products. 



IMPROVED STOVE. 



When the last German arctic expedition was about pre- 

 paring for its voyage to the north pole, Captain Koldewey 

 asked the aid of scientific men in devising a stove that would 

 answer the double purpose of supplying a sufficient amount 

 of heat and of economizing the fuel. Various responses were 

 made to this appeal, and among the patterns furnished that 

 of Professor Meidinger, of Carlsruhe, was considered the best. 

 This is simply an iron stove having a double wall, with a 

 space about two inches wide between the outer and the inner 



