L. TECHNOLOGY. 525 



and brought across the country to the East. JYeio York Ship- 

 ping Zist, April 15, 1871. 



DETECTION OF FUSIL OIL. 



The existence of fusil oil in alcoholic liquids can, it is said, 

 be readily recognized by placing a portion in a glass tube, 

 and shaking up in it a piece of iodide of potassium. Should 

 there be even one fifth of one hundred per cent, of fusil oil 

 contained in the liquid, a distinct light yellow color will be 

 developed, the change taking place with still greater rapidity 

 if the tube be heated. 18 6', xxil, 3Iay, 1871, 352. 



UTILIZING OLD VULCANIZED RUBBER. 



It is announced that a method has lately been devised by 

 which old and refuse vulcanized rubber can be mixed with 

 the fresh, in certain proportions, so as to convert the whole 

 into one homogeneous and useful mass. IQA^July, 1871,410. 



PURIFYING CARBONIC ACID GAS. 



An excellent method of purifying carbonic acid gas, ob- 

 tained from limestone, consists in conducting it through ol- 

 ive-oil, and an increase in the number of the points of contact 

 with the out-streaming gas is effected by the introduction of 

 pieces of pumice-stone. 18 C, xlil, 657. 



FRENCH SILVER LAC. 



This consists of very finely divided tin precipitated from 

 its solution by means of zinc. Applied by means of some ad- 

 hesive substance to wood, paper, and metals, it communi- 

 cates to them a metallic silvery appearance. 5 C, 1871, 384. 



ANTIDOTE TO CARBOLIC ACID. 



A strong solution of saccharate of lime, it is asserted, is a 

 thoroughly reliable antidote against the poison of carbolic 

 acid, when by accident taken internally. 1 A, November 24, 

 1871,252. 



REMOVING THE ODOR OF CARBOLIC ACID. 



The value of carbolic acid for many applications is now 

 well established, but for medical purposes is greatly dimin- 

 ished by the odor, which is extremely offensive to many per- 



