180 H. Wuriz on the Mouth Blowpipe. 
combustible matter contained in the same volume. JI therefore — 
searched for combustibles having a high density of vapor, and 
found that the paraffine of Reichenbach, now known from the 
investigations of Hofstaedter* and Filipuzzit to be a mixture of 
ifferent isomeric hydrocarbons, all of which must haye very 
high equivalents, was found by Lewyt to have a vapor-density 
of not less than 11:8. By inquiry, 1 found that candles com- 
osed of this, or a similar material, obtained from the products 
of distillation of the well-known “ Breckenridge Coal,” could be 
bought in New York. On procuring some of these, and using 
them as pabulum for the blowpipe-jet, I found my anticipations 
fully realized. The flame obtained by means of the parafline 
candle is much hotter than that from a wax candle. Tinforte 
las yf 
pipe of Berzelius’ form by means of a perforated cork; but of 
course in practice this tube may as well be composed of metal t0 
the concomitant inconveniences, though the latter are oi 
important, according to my own experience, than many W‘ 
Suppose, : 
ow as to the effects which may be produced by the com 
tinum wire of 
tion of these several medi 
veral appliances, Platin tained 
ts dows 
blowpipe size is fused with little difficulty, and I have . 
* Liebig and Kopp’s Jahresbericht, 1854, 608. 
+ Ibid. 1355, 63a ents we 
+ Loewig’s Chemie der organischen Verbindungen, ii. 564. 
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