396 ON THE CONTAGION OF ITCH OR MANGE. 
An alteration is also desirable in the third (now the fourth) 
clause, which permits the wholesale purchaser to buy Arsenic in 
quantities of NOT LESS THAN 100/fo. WEIGHT; the effect of 
which provision would be to oblige many persons to purchase 
several times the quantity they require. 
Pharmaceutical Journal, May 1851. 
SOLUTION OF LAC A SUBSTITUTE FOR COLLODION. 
As a substitute for collodion, Dr. Mellez recommends a solu- 
tion of powdered shell-lac in hot highly-rectified spirit. The 
solution when cold becomes gelatinous, and is used by joiners 
for polishing furniture. Spread on taffeta or linen and applied 
to the skin, it shews all the properties of collodion. It is im- 
penetrable to air, water, fat, and the organic secretions; it does 
not irritate the skin, and can be employed instead of dextrin for 
fractures. Wounds heal remarkably quickly when dressed with 
this solution . — Pharmaceutical Journal, May 1851. 
Foreign Extracts. 
ON THE CONTAGION OF ITCH OR MANGE (GALE), 
AND ITS TREATMENT. 
By M. le Dr. H. Bourguignon, Laureate of the Institute, Member 
of the Society of Medicine of Paris. 
( Read at the Academy of Sciences, at their Sitting of Nov. 11, 1850.) 
[Continued from page 354.] 
Chapter II. 
On the Communication of Itch from. Man to Animals. 
The non-transmission of mange (or itch) from animals to 
man leaves room to suppose that every animal possesses its 
proper acarus, and an itch or mange peculiar to it : the study of 
the contagion of itch from man to animals confirms this opinion. 
Communication of Itch from Man to the Dog. 
On the 9th of May ten lively acarus, taken from an itched 
subject, were transported upon a dog of middle size, from two 
to three years old, five being placed upon its back, and five upon 
its belly. 
