178 Foreign Literature and Science. 
Almost every piece of money, French or foreign, ancient 
or modern, gold, silver or copper, but especially the. silver, 
coins of Italy, attracts the sideroscope with greater or less 
activity: it is the same with all substances, mineral, vegeta- 
ble or animal, which contain the least atom of iron, nickel 
or cobalt. Platina exercises a decided action, notwithstan- 
ding al} the chemical ee necessary to bring it to a 
soft state 
Small 1 masses of any of the following substances, weigh- 
ing at most, eight or. ten grains, affect this delicate. instru- 
ment. All kinds of ashes, compacted by a little gum water ; 
blood simply dried or. swelled ; chocolate; bottle glass ; tour- 
malines, green and, black, not rubbed or warmed ; granite ; 
thomboidal quartz; yellow topaz; green talc ; sul hate of 
iron ; all vatoane et ea ; oh | metals not chemica pure ; 
brass —- the fine or ye en tomologintssYarious 
orns of °c: 
The most satprisithe effect of the Sideroscope is ie re- 
pulsion of the needle by bismuth and antimony.—Idem 
oo, y of Tin.—M. Oehngern undertook, in 1822, 
the mayer of the various kinds of tin employed in the man- 
ufacture at Closter of sheet tin (fer-blanc) in order, to dis- 
cover the cause of the superiority of certain kinds. He dis- 
covered that the English grain tin, which gives the. finest tin- 
ned suringe contains no foreign body. 
inman, who has rendered great service to the Closter. 
fabric, eat e engaged in the examination of the saline 
rasdeain obtnned4 in the purification of common tin in order 
fo render it fit for tinning. He finds} in the 100 Rarts; 
Tin, .3000 
“—€opper, — - . . tart ieaa7e 
~ fron ae SC : - . - -3300 
6712 
cludes that to the, arsenit; and especially, to the 
copper, ought to be attributed. the prope rty which impure. 
tin ne “of. ~< its. lustre when used in_tinning other 
93, P sian Blue _M. Gautier in his theoretical re- 
-searc hes in au ie formation of cyanogen has been led to the. 
conclusions, First, calcined animal m atter. will 
eee seem 
