500 
me. J. B. LAWBS and DE. J. H. GIIBEET ON THE COMPOSTTION OB 
3rd. TTBCLtmeifit of the Crude Dry Substance. 
Accui-ately calculated and weighed yiropwtwM? parts of the whole of the respective 
crude dry matters were taken as follows 
(a) For the determination of the Ash of each separated part. 
[h) For a mixed sample of entire Carcass Parts, for anal) sis as snc 
fc) For a mixed sample of entire Offal Parts. , i - 
Id) For a mixed sample of the Mre Amal ;-that is, including both Carcass 
and Offal parts (but of course excluding the melted and expresse at). 
The remaining portion of the cnde dry substance of each separated part is presen ed 
4th. Determination of the Mineral Matter, oi Ash. 
The proportional part of each separate crude dry substance weighed out for ash. uns 
burnt in a platinum dish, 10 inches long and 5 inches nude, placed in a cast-uon inuffl 
heated by coke. The weight of the ash of each separate part bemg taken, 
parts of the respective ashes were weighed out, and mixtures made, as follows . 
(a) Of the ashes of all Carcass parts. 
(b) Of the ashes of all Offal parts. 
(c) Of the ashes of all parts ; that is, of the Entire Animal. 
The remaining ash of each separate part is preserved as such. 
5th. Deter, ninutim of the Fat not separated by nieUimg and 
renramed therefore in the separate, and proportionally mixed samples, of the cndi 
dry substance. 
This remaining Fat was deteimined by extraction with ether. A portion amounting 
generally to about 4 or 5 grammes, of the m-ude dry substance, was weighed in a mia 
porcelain capsule, and the hygroscopic water determined by drying m a ^ ■ 
212° The re-dried substance was then transferred into a small flask, and the cap.^ 
rinsed into it with ether. More ether being added, and the A-k lightly closed, he 
mixture was digested for some time, and then thrown upon a^weighed hlter. 
and its contents were first washed with the ethereal rinsings of the flask, and A wA) ^ 
pure ether, until the filtrate no longer stained bibulous paper. The etheie. . ■ 
containing the dissolved fatty matter, was collected in a small balanced flask, the etl ei 
distilled off over a water-bath, and the flask with its fluty contents .after being 
dried at 212°, was re-weighed. The filter, containing the matters insoluble in ethei, 
• The statement of the method of preparing the ashes of the collectU-e parts given in the 
those of all the animals operated upon, excepting the two pigs. Of these, the eonec ive ^ 
lective offal, and the entire animal ashes, were nmde by burning, at one process, carefully made 
the proportional parts of the respective crude dry matters. 
