744 
CORRESPONDENCE. 
A. P. S. (17, Bloomsbury Square) wishes 
for a good form for marking ink that will 
keep crimson. 
“ Justitia ” complains of the delay that 
has occurred in announcing the results of 
the Preliminary Examination to the candi¬ 
dates. We understand this will not occur 
in future. 
J. S. E .—Methylated spirit, mixed with 
an equal volume of wood naphtha, may be 
sold by those who have a licence. 
J. S. S. would, we believe, have no diffi¬ 
culty in getting hydrometers, and also ther¬ 
mometers, that would answer his purpose, 
at either of the houses, named, but those 
that are delicate in their indications cannot 
be of long range. (2.) Yes. 
“A Disgusted Chemist and Druggist .”— 
The practice complained of is much to be 
deplored. 
H. L. J .—In the formula referred to, the 
quantity of wine intended is probably one 
ounce, but it seems impossible to make a 
good emulsion from the proportions indi¬ 
cated. 
C. J. C. (Greenwich).—(1.) Convallaria 
Polygonatum. (2.) Actcea; see Yol. II. 
(s.s.) p. 460. 
F. C. (Congleton).—“ Tvnctura Podo- 
phylli.” We know of no formula for this 
tincture. A tincture of podophyllin is made 
in the proportion of 3 grains of the resin to 
one drachm of rectified spirit. 
G. W. (Dorset) should apply by letter to 
the Secretary, 17, Bloomsbury Square. 
T. E. wishes for a formula for “ brillian- 
tine.” 
J. B. (Driffield).—Yes. 
“Eappa” (Lee).—“ Metric System of 
Weights and Measures.” Such a knowledge 
as would be required in dispensing a pre¬ 
scription written according to that system. 
Mr. T. Stokoe (Clare), with reference 
to the difficulty sometimes felt in labelling 
some of the preparations of opium, suggests 
the use of the following label:—“ Poison, if 
taken in improper quantity.” 
J. W. (Sheffield) should apply, by letter, 
to the Secretary. 
A. T. (Carlisle).— Syrup of Bromide of 
Iron. Take of— 
Bromine, 1000 grains. 
Iron, 500 grains. 
White Sugar, 8 ounces. 
Distilled Water, 3000 grains. 
Simple Syrup to 40 fluid ounces. 
Ginger Beer, by Fermentation. —At the 
request of a correspondent we insert the 
following. Take of— 
Befined Sugar, 3 pounds. 
Bruised Ginger, 2 ounces. 
Cream of Tartar, 1 ounce. 
Lemons, sliced, 4. 
Boiling Water, 4 gallons. 
Yeast, 8 ounces. 
Pour the water on the first four ingredients, 
and infuse for two hours; then strain, add 
the yeast, and when fermentation has con¬ 
tinued for a few hours, put it into stone 
bottles and secure down the corks. 
F. O .—Black oxide of manganese (man¬ 
ganic oxide), when heated alone, for the 
purpose of obtaining oxygen gas, yields 
one-third of its oxygen, 3 (Mn0 2 ), giving 
Mn 2 0 4 + 0 2 . When heated with suljffiuric 
acid, the same oxide yields one-half of its 
oxygen as gas, 3 (MnG 2 ) + 3 (H 2 S0 4 ) giving 
3 (MnS0 4 ) + 3 (H 2 0) + 0 3 . Therefore, 
from a given weight of manganic oxide, 
half as much more of oxygen may be ob¬ 
tained by heating it with sulphuric acid 
than by heating it alone. 
A. B. (Streatham).—(A.) Phosphorus 
Pills. Yol. VII. (n.s.), p. 615. (B.) From 
the absorption of carbonic acid. (C.) If 
any change takes place, it would probably 
be one of oxidation. 
M.JEC. (Southampton).—So much has ap¬ 
peared in this Journal on the subject of 
chlorodyne, that we must leave our readers 
to judge for themselves as to the relative 
value of the different formulae given. 
A. P. S. (Wellingborough).—We imagine 
that the order to make the mixture referred 
to with infusion of calumba must have been 
subsequent to the writing of the original 
prescription. 
“A Country Chemist.” — Ol. Pini Sylves - 
tris. Identical with “ Fir-wool Oil.” 
G. E. C. wishes for a formula for “ Blah’s 
Gout Pills.” 
H. O. W. (Wakefield).—The new Ho¬ 
moeopathic Pharmacopoeia is now in course 
of publication by the British Homoeopathic 
Society. 
J. C. (Newcastle).—Oliver’s ‘Elementary 
Botany’ (Macmillan and Co.). 
Erratum. —The reply to “ W. L. G.” in 
our last number, page 664, was not strictly 
correct, and applies only to old members. 
Every member is not of necessity a Phar¬ 
maceutical Chemist. 
Instructions from Members and Associates respecting the transmission of the Journal 
should be sent to Elias Bremridge, Secretary, 17, Bloomsbury Square, W.C., before the 
25th of the month. 
Wanted, the ‘Pharmaceutical Journal’ for January, February, and March, 1870. 
Full price will be given. 
Advertisements (not later than the 23rd) to Messrs. Churchill, New Burlington 
Street, London, W. 
