490 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



ed by him. The new extract is readily obtained by rubbing 

 to a very fine powder one part, by weight, of crystallized sul- 

 pho- hydrate of sodium with three parts of fine prepared 

 chalk. This mixture is to be kept in well-closed bottles until 

 needed for use, when a small portion of it is made into a 

 thick paste with a few drops of water, and applied by means 

 of the back of a knife to the spot cgated with hair. In a 

 very few moments the thickest hair will be converted into a 

 soft mass, and can be easily removed from the skin by wash- 

 ing. Care must be taken not to keep the substance too long- 

 on the skin, as it would corrode it. 14 C, CCV., 492. 



MATCHES WITHOUT SULPHUE. 



According to a method patented in France, non-explosive, 

 non-hygroscopic matches may be made by impregnating the 

 wood with a hot solution of a fatty material. The inflam- 

 mable compound consists of phosphorus, 7 ; gum, 7 ; nitrate 

 of lead, 40 ; glass powder, 5 ; water, 10 parts. 14 G^ CCVIL, 

 1873,341. 



GAS MANUFACTURE BY EVELEIGh's PROCESS. 



Exhaustive experiments have been made by Professors Od- 

 ling and Keates with this process, Avhich consists in distill- 

 ing the coal at a low temperature, and redistilling the tar 

 obtained ; thus, it is claimed, obtaining more and better gas 

 from a given weight of coal. They found no better quanti- 

 tative, but a better qualitative production by the process, 

 with entire absence, however, of the tar, as an accessory prod- 

 uct. More fuel was also required than by the ordinary proc- 

 ess, and, since the gas is given off more slowly, the outlay 

 of capital in the works, as well as the running expenses, must 

 be greater, and the increase in quality is no oflset to these 

 increased expenses. 14 C\ CCVIII., 1873, 155. 



THE NEW HYDROCARBON GAS. 



Experiments have recently been made in England on the 

 illuminating powers of a new hydrocarbon gas, produced by 

 what is known as Mr. Ruck's process. The heating gas is al- 

 most pure hydrogen, obtained by passing steam through a 

 horseshoe-shaped tube that goes through the red heat of a 

 coke furnace. In this state the gas used for all purposes 



