. For wae take two parts of silver (precipitated 
the nitric solution by copper leaves,) two parts cream of jartar, 
two parts marine salt well pulverized. Apply this in the same way — 
as above described. When the piece is perfectly whitened, put it 
into water: containing. a little potash. Agitate it well in clear pets 
hout which it will tarnish and bceome yellow.—Jour. de C 
ere Glass syphons ere pias corrosive fluids.—M. Con- 
Larpeav has designated the form of a glass sy phon, which saves the 
necessity of applying the mouth or even. the finger to either end of 
the tube. Dip: the end a of Fig. 1. into the fluid to be. transferred, 
and pour into the funnel or side opening 6. a quantity of the same 
Guide i it flows out of the end c. The fluid in the vessel F. G., 
then rises and continues through a dec. In this case, the branch 
mn remains full, while the liquid in  n subsides to near the bend a. 
me. 3. fe Be a 5 
Pte: © - sds = 
cSaSs ore —\ ae ee: By eee ean 
aes 
ere 2B 
“The same e object i is - effected by the more simple form of. Fig des 
rovided the opening c is closed with a finger until the long | brancl ch 
f the syphon is full,—or, the application of the finger is unnecessa: 
the fluid be poured into the funnel faster than it can be discharged 
rough ¢. In that case, the long branch. of the sypbon will fill and 
act in the usual way.—Bull. D’Encour. Fev. 1832. se 
¥ 
elt: Carbonate of lime ‘and its compounds ; . (M. BecqueneL.)— 
c € carbonate is found i in. countries of the oldest formation, 
; ; oe ° as ie 4 
of a ee texture, sometimes saccharoidal, and sometimes more 
