178 
VARIETIES. 
although it acts on minute portions, still that must be in a concentrated 
condition. For instance, though we may detect the l-1000th of a grain of 
corrosive sublimate in a drop of water, we cannot detect it in a drachm; 
but this may of course be remedied by evaporation. 
Now, with regard to the theory of this process, the following seems most 
satisfactory, that the iodide of potassium forms a soluble and easily decom- 
posed salt with the various salts of mercury ; that is, an iodide soluble in 
excess of the iodide of potassium.' 
The foregoing is the substance of a paper read by Mr. Arthur Morgan, 
City of Dublin Hospital, at the first meeting of the Student's Medico- 
Chirurgical Society, on Friday, December the 12th, 1851. — Pharm. Journ., 
Feb. 1852, from Dublin Medical Press, 1852. 
£We have tried this test with several poisonous preparations of mercury, 
as white precipitate, turpeth mineral, etc., and find it extremely sensitive. 
A drop of distilled water on a bright penny, with a grain of iodide of po- 
tassium dissolved in it, gave a positive indication of mercury when one- 
eighth of a grain of sugar containing l-3200ths of a grain of white precipi- 
tate was added to it. — Ed. Am. Journ. Pharm.'j 
Comparative Value of Cod-Liver Oil and Fish Oil mixed with Iodine. — 
Dr. Champouillon, professor at the Army Medical School of Val de Grace, 
has just laid before the Academy of Medicine the result of the comparative 
experiments he has made upon phthisical patients with cod-liver oil, and 
simple fish oil mixed with iodine. Dr. Champouillon gave the cod-liver oil 
to 120 patients laboring under phthisis. Fifty-one were in the first stage ; 
and of these, twenty-four were benefitted, and none died. Thirty-seven 
were in the second stage ; of these, nine recovered, and three died. Four- 
teen were in the third stage ; and here six recoveries and four deaths took 
place. The author gave the iodated oil to seventy-five patients in different 
stages of phthisis : no improvement took place in any case, and in several 
it was noticed that the remedy did harm. — Lancet. 
Cost of the Doctorate in Paris. — The Union Medicale makes the following 
estimate of the cost of the Degree of Doctor of Medicine in Paris: — The 
collegiate education requires 7 years, and to obtain the two baccalaureate 
degrees, 2 years more are necessary ; then the medical studies, properly 
speaking, will average 6 years ; making a total of 15 years. The 7 years 
at college cost 1000 francs per annum, making 7000 francs; the 2 bacca- 
laureates, 320 francs ; the 6 years at medical college, 1200 francs a year, or 
total 7200 francs. Private courses of study, 1000 francs ; matriculations, 
examinations, and diploma fee, 1100 francs; instruments and books, 2000 
francs. Making a grand total of 18,620 francs, or about $3,724. — Med. Exam. 
Arabian and Cyprian Aloes. — Dr. X. Landerer states that much of the 
aloes employed in the East is produced in Arabia, where various species of 
