DISINFECTANTS IN VETERINARY PRACTICE. 
17 
advantage in the disinfection of wounds. It is somewhat ob¬ 
jectionable, however, as it stains everything with which it 
comes in contact. I will digress slightly here, to say that the 
non-irritating properties of this drug render it a valuable eye 
medicine for certain cases. We have used it at the hospital 
in cases of suppurative ophthalmia with good results. For 
those who desire to give this drug a trial, I will say that 
experiments which I have made show that a i to 200 solution 
is equal to a two per cent, solution of crystalline carbolic 
acid. 
The treatment of wounds by the application of a powder 
is an excellent way to treat many suppurating wounds. You 
are all aware that many wounds must be treated, which can¬ 
not be bandaged, and that some wounds which can be band¬ 
aged, will do better without. What powder shall we apply 
to such cases? To determine the action of some preparations 
in this way, I have made several experiments in the labor¬ 
atory, besides the use of different agents, on cases under 
.observation. In my opinion, a powder dusted over the sur¬ 
face of a suppurating wound should serve two purposes: it 
should prevent, or at least retard, the growth of organisms, 
and combine with the secretions to form an artificial scab. To 
make the conditions somewhat similar to those existing when 
we apply powder to a wound, I dusted the powder over sur¬ 
face inoculations made on agar agar with the pus organism, 
staphylococcus pyogenes aureus, and placed them in the 
incubator; I used iodoform (common and resublimed), iodo¬ 
form and calomel mixed, pyoktanin, iodol, salycilic acid, 
boracic acid and aristol all in the form of powder, iodoform 
(both preparations) iodoform and calomel, pyoktanin, boracic 
acid, salycilic acid, prevented all growth ; but iodol and aristol 
did not apparently retard growth in the least. 
In applying to wounds, I have noticed that powders not 
soluble in the wound secretions remain much longer on the 
surface, preparations being washed away; consequently iodo¬ 
form remains longer on the surface than most of the others. 
We conclude that iodoform is entitled to the high place which 
it occupies as a dry dressing for wounds, but that as a dry 
