PREPARATION OF OXIDE OP ZINC. 
169 
lias carried out the requisitions of the law faithfully arid 
fearlessly. No man in the country could have more satis- 
factorily executed the trust. 
I would be doing injustice to my own feelings were I to 
close this communication without tendering to you, sir, my 
sincere thanks for the prominent part you have taken in 
bringing this important matter to its present success and 
usefulness. The encomiums of a number of the New York 
Journal of Medicine, recently published, are well merited, 
and the references to the part you have taken in the incep- 
tion and progress of this law are true. In the midst of 
your numerous and responsible duties, you have not been 
unmindful of the claims of science and humanity. From 
the appointment and directions given to Dr. Bailey, at New 
York, previously to the passage of this bill, to the present 
moment, you have ever had an earnest desire, and have 
taken a leading position to consummate its benefits. That 
it may fulfil our largest expectations, and that your health 
and life may long be spared to your country, is the wish of 
Your humble servant, 
T. 0. Edwards. 
Hon. K. J. Walker, Secretary of the Treasury. 
ART. XXXIII. — ON THE PREPARATION OF OXIDE OF ZINC 
BY COMBUSTION. 
By Mr. G. D. Midgley. 
The author calls the attention of Pharmaceutical Chemists 
to what he conceives to be the advantages resulting from 
the preparation of oxide of zinc by combustion. Having 
directed his attention to this subject for many years, and 
constructed an apparatus for the purpose of effecting the 
combustion of zinc, he has been enabled to overcome the 
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