508 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



enough is to be added to the paste, etc., to give it a decided, 

 strong smell. The paste, it is rejDorted, will never mould nor 

 become sour, and the addition of the carbolate produces no 

 inconvenience nor injury to the workmen. 5 C, vn., 56. 



PREVENTING MOULD IN WEAVERS' SIZE. 



To prevent the moulding and souring of the size used in 

 weaving, the addition of carbolate of natron is recommended. 

 For this purpose common carbolic acid is dissolved in caustic 

 soda (soap-boilers' lye), and just enough mixed with the sizing 

 paste to make its odor distinctly perceptible. It is asserted 

 that neither the fibre of the fabric nor the health of the work- 

 men are in the least injured by the preparation. 9 (7,1872, 

 iv., 56. 



ACTION OF STARCH UPON ANILINE COLORS. 



A German chemist informs us that starch possesses the pe- 

 culiar power of absorbing the coloring matter from solutions 

 of aniline colors and fixing it upon itself. If a thin paste be 

 made of wheat or potato starch, and cotton wool be soaked 

 therein, and the wool thus treated be worked in some aniline 

 color bath, a tint is obtained of the required shade. It is 

 advisable to use a certain proportion of size, as the shades 

 were found to be obtained by its use more readily than when 

 it is not employed. 21 A, April 1, 1872, 320. 



NEW BLEACHING PROCESS. 



A new bleaching process, announced by Pubetz, of Prague, 

 consists in first dissolving about nine pounds of permanga- 

 nate of potash or soda in water, and then adding about one 

 fourth this amount of sulphate of magnesia dissolved in water. 

 The color of the liquid is then a very fine violet, and, thus 

 prepared, will suffice for about 220 pounds of wool. A sul- 

 phurous acid bath is also prepared, containing about thirty 

 volumes of the gas to each volume of water. This bath must 

 be heated to 77 decrees Fahr. when used. The materials to 

 be bleached are first thoroughly cleansed, and then kept in 

 the permanganate bath for a quarter of an hour, on with- 

 drawal from which they will be found covered with a deposit 

 of peroxide of manganese. They are next introduced into the 

 sulphurous acid bath, which reduces the peroxide of manga- 



