On adipocire, and its formationWetherill, Charles Mayer
Science
On adipocire, and its formation
Wetherill, Charles Mayer
Adipocere; Fatty acids; Postmortem changes
The two specimens of adipocire were melted with about one and a half
times their weight of ordinary alcohol, filtered hot, washed a couple
of times with hot alcohol, and pressed, the residue being weighed.
This gives an approximate per centage of the membranous and fibrous
matter, which is rather too low, owing to a little fat remaining in the
residue and filter. The specimens of adipocire were picked as far as
practicable from dark pieces.
No. 1, 360 grammes, gave nine of residue, or a per centage of
Fat colouring matter and water, 97.8
Organic tissue, 2.2
—————
100.0
No. 2, 997 grammes adipocire, gave twenty-seven residue, or per cent.
Fat colouring matter and water, 97.3
Organic tissue, 2.7
—————
100.0
The fats were then saponified with Potassa; No. 1 by Chevreul’s
process, and No. 2 by Heintz’s process with alcohol. The soaps were
precipitated several times, by solution of common salt; no ammonia nor
cholesterine were detected during the process; a heavy, flocculent
soap fell during the melting, which was examined, and found to be a
soap of alumina, oxide of iron and magnesia; probably from impurities
in the salt. No glycerine was present (by direct experiment) in either
of the specimens. An examination for volatile fatty acids, gave
negative results for number one, and a very slight trace in number two
of volatile fatty acids, acetic and butyric, and one or two minute
floating oil drops, most probably from the alcohol employed.
The fats thus obtained, were very dark in colour, and when cooled,
after being melted in a capsule on water, solidified with a smooth,
waxy surface, with the fibres of crystallization vertical. At the point
of crystallization, the expansion pushed up, and broke the soft cake of
fat in the centre. No. 1 weighed 237 and No. 2, 644 grammes.
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