~ oS ese 
dj : 
x 
: 
like wax. A borax bead volatilizes rapidly in white smoke. 
By moistening the end of a bent platinum wire, and dipping it 
into pure carbonate of lime or pure magnesia, and exposing it 
to the flame, a very fair exhibition of Hare’s lime light, in min- 
lature, may be made. The fusion of a small iron wire, and the 
combustion with brilliant scintillations of a small steel watch 
spring may be exhibited as class experiments in a very striking 
manner, 
Hf. Wurtz on the Mouth Blowpipe. 181 
9 ; 
cipitated silica, and with a fragment of a colorless transparent 
‘rent to the wire, as if melted fast, and under the lens pre- 
“ents the appearance of small transparent, irregularly shaped 
T have little doubt that with 
bi above mode of obtaining a high heat is essential to the 
Pacticability of a peculiar mode of manipulation that I have de- 
"sed, and which I shall proceed to describe. 
Whitney's Ty ° 
vy § translation, 46. 
+ Berzelias, im a note, a 20 an announcement of H. de Saussure that he melt- 
throuch i. uPPorted on a slip of kyanite, with a jet of air from a double bellows 
ugh the flame of a thick waz candle; adding, however, that he suspects that 
: ve produce n the assay, and that the air from the 
& resylt ‘ing purer than that of the lungs, may have also contributed to effect 
tion, p. Pveaaes cannot be obtained by the mouth owpipe.”— Whitney's Transla- 
SECOND ¢ 
OND ome Vor. XXVI, No. 80.—_MARCH, 1869. 
