124 Scientific Intelligence. 
uric acid or alloxane are now known only in the laboratories. The 
price will be cheapened when it is cee a branch of industry, and iris 
certain that guano will here find a ne nd. 
he red of murexid resists the bee of alcohol, ether, and ie 
re and oxalic acids. Muriatic, nitric and sulphuric acids destroy 
; but if the destruction is not complete, the color may be restored by 
means of ammonia. Caustic alkalies destroy it rapidly. Reducing 
iehamotin, such as a on tin, sulphate of iron, cause it to dis- 
appear; but the color may be restored by means of am 
Cotton, com with a ian td or not, whether snimalized (Bro- 
quette’s process) or mixed with wool, is not dyed with murexid. Im- 
pressed with the op cone and then treated with hot iron, cotton is col 
ored it is true of a rose tint, and the color is deepened with ammonia; 
but the color does not stand washing, water causing it wholly to dis 
appear. 
Silk does not take the amaranth color of murexid; it becomes yel- 
lowish rose. . Schlumberger recognizes in this property a means 
—o cotton, silk, and wool. 

SCIENTIFIC INTELLIGENCE. 
I. Cuemistry AND Paysics. 
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re which the current may produce. The results obtained are 4 
follow 
(i: ) The chemical actions generated by the elements in activily at 
the exclusive source of the calorific effects produced by the battery. 
(2.) All the chemical actions which take place in the voltaic couple 
concur simultaneously in the production of the current. 
3.) The disengagement of heat produced by the passage of voltai¢ 
electricity through. metallic conductors is rigorously nasa 
he heat confined in.the elements of the battery, to form a sum eq 
to the total heat corresponding simply to the chemical actions inde- 
SPs of all electricity transmitte 
4.) The chemical decompositions which the passage of the elect e 
city through the cireuit may effect, always bring into play quantities 
heat the same as those which accompany chemical decoraposinees ” 
Chimie et de Physique, xl, 293, adn 185. 
ms “On the donble Bows ion He bed serait in eieirenis ot 

