The addition of bromides is superfluous, sometimes injurious. Bromides
in quantities, as added to ammoniacal pyro, would reduce the
sensitiveness to 1/10 or 1/20; will even retard the developing power
almost entirely.

Must a restrainer be resorted to, 1 to 3 min. of a 1:10 solution of
potassium bromide is quite sufficient.

* * * * *




THE PREPARATION OF LARD FOR USE IN PHARMACY.

[Footnote: Read at an evening meeting of the Pharmaceutical Society of
Great Britain, November 7, 1883.]

By Professor REDWOOD.


I have read with much, interest the paper on "Ointment Bases,"
communicated by Mr. Willmott to the Pharmaceutical Conference at its
recent meeting, but the part of the subject which has more particularly
attracted my attention is that which relates to prepared lard. Reference
is made by Mr. Willmott to lard prepared in different ways, and it
appears from the results of his experiments that when made according to
the process of the British Pharmacopoeia it does not keep free from
rancidity for so long a time as some of the samples do which have been