ON ADIPOCIRE, AND ITS FORMATION. 13 
1°. An equal weight of alcohol was added, and the fat, which weighed 644 grammes, 
was dissolved by heat; on cooling it was pressed, and as the filtrate deposited more fat on 
standing, it was pressed again, and the fat added to the former. The dark-coloured filtrate 
was bottled, and the fat melted. It was of smooth and waxy surface, and weighed 511 
grammes. 
2°. The fat from 1° was melted with 170 alcohol, and the same operation performed. 
Residue weighed 327 grammes. 
3°, Added 124 alcohol to this fat. In this all the liquor was absorbed by the pressing ~ 
cloths; the fat weighed 335 grammes. 
4°, Added an equal weight of alcohol and melted; pressed after two days. The liquid 
by this time, was light yellowish; the fatty crystals in white flakes or scales; the smaller 
ones transparent under the microscope, and polarizable. A portion of the fat was melted, 
and observed cooling under the microscope with polarized light; as the solidification 
approached, a beautiful play of prismatic colours took place, and the drop shot into crystal 
interlaced lamella. A drop melted with alcohol, and let cool, gave the peculiar dendritic 
curved appearance of margaric acid. 
5°. The fat by this time weighed 300 grammes; it was melted with an equal weight of 
alcohol, and pressed the following day. Residue, 253 grammes. 
6°. This was melted with 250 alcohol; the liquid from the press was very little less 
coloured than the last; the residue weighed 227 grammes, and was brilliant white, with a 
tinge of yellow; the fracture showed large crystals, and could not be distinguished from the 
product of the stearic candle factories. When melted, it cooled with raised, uneven sur- 
face, and was completely soluble in ether. When the ethereal solution was suffered to 
separate spontaneously, the first fat which made its appearance melted at 60°, solidified 
at 55°, and the fat extracted from the rest of the ether gave exactly the same points. 
The following are the melting points yielded by the fatty residues of the foregoing alco- 
holic crystallizations : 
Fat 2° ‘ : : melts 58° : E solidifies 53° 
Gi BO p : : G Bee i ; GF Bp Spe 
co Ae F : 4 BO ; : 58°a 52° 
COO SmmnnTa LIne & 58°a58°5 | 53° 
6° : : : como. : ; G39 Bye GyAl© 
The examination of the liquids separated from the above crystallizations, was now taken 
up. ‘Their colour was from a very deep reddish brown (No. 1°) down to light yellow, and 
nearly colourless (No. 6°.) In 1°, 2°, and 5°, crystals had deposited by standing, and as 
2° was not corked like the rest, the deposit here was abundant; it was re-melted with 
addition of as much alcohol as had evaporated, and was suffered to stand for several days 
