352 
NOTICES TO CORRESPONDENTS. 
in the solid state, was patented for the above purpose in 1861, by William Rattray, of 
Aberdeen. His process consisted in dipping the substance to be preserved into an acid 
solution of the sulphite, and afterwards exposing it to the air; or in rubbing the dry 
sulphite over the surface of the meat or other substance, and afterwards wrapping it in 
a cloth wetted with the acid solution. This patent was allowed to expire at the end of 
the first, three years, and the process is now public property. The processes patented 
by Medlock and Bailey are in some respects similar to Rattray’s, and in so far the patent 
is bad, and the right to the exclusive use of the processes could not be maintained by 
law. 
N. G. (Berwick).—Nitro-glycerine is produced by the action of the strongest nitric 
acid on glycerine, the action being similar to that which takes place in the production 
of gun-cotton from cotton-wool. The composition of nitro-glycerine is represented by 
the formula C 6 H 5 (N0 4 ) 3 0 6 , three atoms of the hydrogen of glycerine being replaced 
by three atoms of peroxide of nitrogen (N0 4 ) resulting from the decomposition of the 
nitric acid. See also page 332. 
“Iota.” —The object is to obtain freshly precipitated phosphate of lime, which is 
more soluble than the dry salt. 
“ An Apprentice ” (Islington).—If made strictly according to the directions, the pro¬ 
duct should be clear; the defect referred to is probably due to the honey, which might 
be previously clarified. 
“An Inquirer ” (Carlisle).—The percolated liquid is ordered to be evaporated to 13 
fluid ounces, in which the sugar is to be dissolved. 
“Emerald ”—To act as a dispensing chemist in Ireland, it is necessary to pass the 
examination of the Apothecaries’ Company. 
T. W. M. (Rochdale), and A. S .—A new edition of the ‘Pharmaceutical Latin 
Grammar’ is expected shortly. 
A Major Associate. — The specimen of saffron forwarded for our inspection is, perhaps, 
the very worst sample of that drug we have ever seen. It is only saffron in name. 
The bark appears to be a specimen of one of the spurious yellow cinchona barks, but if 
our correspondent will forward us a larger piece we shall then be able to speak positively. 
It does not appear to us to have been exhausted of its alkaloids. We entirely agree 
with our correspondent as to the desirability of Pharmaceutists being so educated as to 
be able to discriminate between good and worthless drugs. 
“ Vendo ” (Leeds).—(1) The reference should have been No. XI. (May, 1867),and’ 
was so corrected in the following number. The so-called “Glycerine and Lime Cream’ 
does not contain lime-juice. (2) Hair Lye. Yol. XV. page 144. We are unable to 
enlighten our correspondent with reference to “ Shampooing Wash,” “ Arabian Oil,” 
etc. 
Student .— No; but Dr. Garrod’s ‘ Essentials of Materia Medica ’ is advertised to be 
published shortly. 
Associate (Bristol).—Bentley’s ‘ Manual of Botany,’price 12s. Gd. (Churchill and Sons.) 
A Correspondent.—Artificial Seltzer W<der. —The following has been given as its 
composition :—Muriate of lime and muriate of magnesia, of each 4 grs.; dissolve these 
in a small quantity of water, and add it to a similar solution of 8 grs. of bicarbonate of 
soda, 20 grs. of muriate of soda, and 2 grs. of phosphate of soda ; mix and add a solu¬ 
tion of i of a gr. of sulphate of iron; put the mixed solution into a 20 oz. bottle and 
fill up with aerated water. 
A Candidate .—A knowledge of the plants you refer to will be sufficient. 
“A Correspondent .”—German works on pharmacy:—Buchner’s ‘ Repertorium fur d. 
Pharmacie.’ (Monthly.) ‘ Neues Jahrbuch fur Pharmacie.’ (Monthly.) ‘ Schvveizer- 
ische Wochenscbrift fur Pharmacie.’ (Weekly.) ‘ Yierteljahresschrift fur Praktiscke 
Pharmacie.’ (Quarterly.) 
Instructions from Members and Associates respecting the transmission of the 
Journal before the 25th of the month, to Elias Bremridge, Secretary, 17, 
Bloomsbury Square, W.C. 
Advertisements (not later than the 23rd) to Messrs. Churchill, New Bur¬ 
lington Street. Other communications to the Editors, Bloomsbury Square. 
