Zaloziecki found this in the case of the several
Galician oils he examined. Corresponding to the 4.6, 5.8 and 6.5 per
cent. of proto-paraffine in the several oils he obtained 2.18, 2.65
and 2.35 per cent., respectively, of pyro-paraffine.
For the present, however, the extraction of proto-paraffine on a large
scale by means of such solvents as amyl and ethyl alcohols is out of
the question on account of their cost. A distillation, under reduced
pressure and with superheated steam, would, however, prevent much of
the decomposition of the original proto-paraffine and increase the
yield of pyro-paraffine.
This study of Zaloziecki's method and the examination of American oils
was suggested by Professor Sadtler and carried out in his laboratory.
* * * * *
TRANSMISSION OF PRESSURE IN FLUIDS.
By ALBERT B. PORTER.
The young student of physics occasionally has difficulty in grasping
the laws of pressure in fluids. His every day experience has taught
him that a push against a solid body causes it to push in the same
direction, and he often receives with some doubt the statement that
pressure applied to a fluid is transmitted equally in every direction.
The experiments ordinarily shown in illustration of this principle
prove that pressure is transmitted in all directions, but do not prove
the equality of transmission, and in spite of all the text books may
tell him, the student is apt to cling to the idea that a downward
pressure applied to a liquid is more apt to burst the bottom than the
side of the containing vessel.
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