126 Scientific Intelligence. 
added to the et reg solution of toluidine, with the production 
of a distinct blue zone. If on the other hand, a mixture of 
water and ether be saab s the solvent, ie chlorid of lime 
mes the most delicate test for the free alkaloids. ‘Aniline be- 
comes distinctly blue even in presence of toluidine, and greenish 
in presence of pseudo-toluidine. The alkaloid is dissolyed in 
pong an are volume of water is added and then chlorid of a 
rop, agitating strongly till the color appears. 
: pia a ethereal layer into a tube containing water, Hiding a 
: p of any dilute acid and shaking, there is developed a magni- 
ficent red color comparable to that of permanganate. This is a 
most delicate test for pseudo-toluidine ; neither aniline olui- 
for the production of the red coloring matter, it is sufficient to 
take its mean boiling point. re ae is true = aniline- black. i 
Bull. Soc. Ch., Il, x, 192, Oct., 
II, MINERALOGY AND GEOLOGY. 
necessarily transitory and ce eran wenctennke: ‘namaitcls as 
the placer miner takes advantage of the work which has been pe!- 
ages over the roc ea the resistless power of glaciers, cover 
ing the a ‘ing the valleys, and every where cutting away 
the rocks and veins the mountains, and throwing the fra gments 
from veins. The in abla of pe a which the 
nr oe has over the — miner is made eres est. 
ie densa ach Sige ne ee Oe 
