474 
Dr. Ure on the ultimate analysis of 
heat into a brown liquid, forming as it cools a solid resembling 
plumbago, which dissolves readily in alcohol, and is thrown 
down by water. Naphthaline is soluble in oils. In water 
heated to 168 0 F. it fuses, and remains like oil at the bottom 
of the liquid ; but when stirred it rises, and spreads on the 
top in little oily patches. At i8o° it rises spontaneously from 
the bottom in oily globules, which, as the temperature is 
raised, dissipate in the air, undergoing motions similar to those 
of camphor floating on water. 
Spermaceti oil is constituted apparently of 
Carbon 10 atoms 
• • 7-5 • 
78.0 
Hydrogen 9 
. . 1.125 . 
. 11.8 
Oxygen 1 
1.0 
. 10.2 
9-625 
100.0 
or, in other words, of 9 atoms olefiant gas -j- 1 atom carbonic 
oxide. The experimental 
proportion is, 
however, more 
nearly, 
Carbon 10 atoms 
. . 7.5 . 
. 79.0 
Hydrogen 8 — — 
1.0 
. 10.5 
Oxygen 1 — — 
. 1.0 
. 10.5 
9-5 
100.0 
There is here an atom of carbon in excess.* 
Common oil of turpentine, specific gravity 0.888, comes 
very closely to the following arrangement : 
Carbon 14 atoms . . 10.5 . . 82.35 
Hydrogen 10 — . . 1.25 . . 9.80 
Oxygen 1 . . 1.00 . . 7.85 
12.75 100.00 
* This is probably the truer view. The former would make it coincide with 
camphor. 
