250 
SELECTED ARTICLES. 
Yes, and I have reason to believe that some of the processes 
without alcohol are followed by manufacturing chemists in 
this country. Can you give any reason why sulphate of 
quinine should not be manufactured with profit in this coun- 
try? I am inclined to believe that a large portion of what is 
used in this country is made in Britain, though not made as 
cheaply as in France. There may be various reasons for 
that; among the rest, efficient workmen in that country are 
cheaper, and a certain degree of chemical knowledge is far 
more common. 1 have examined samples from each country 
with great care, and have found samples manufactured in 
England equal to the finest sulphate of quinine I ever saw. 
Have you met with any sulphate of quinine not of the re- 
quisite purity? Several times; I know a chemist in Edinburgh 
who prefers the British sulphate of quinine, because there is 
a greater certainty of having it pure; for though it is better 
prepared in France, it is more irregular." 
Henry Field, Esq., further examined: — "How does it 
happen that your Society, possessing a laboratory and com- 
plete establishment, such as would be required for manufac- 
facturing sulphate of quinine, is not able to manufacture it as 
cheap as they can purchase it ? I believe it is owing to the 
quantity made in France being much greater than can profitably 
be made here. The English makers do not make it now so 
cheap as the French. The fact is, that our laboratory would 
not be equal to the manufacture of a thing of that kind: it 
requires an apparatus peculiar of itself, of a very expensive 
description. Is not the process of manufacturing sulphate 
of quinine one of those refined processes which, especially 
your society ought to carry on in their own laboratory; in 
as much as it is an article not manufactured to any extent by 
the wholesale chemical manufacturer, is very liable to adul- 
teration, and is inefficacious, except in a state of purity? 
There are not more than two or three manufacturers in Eng- 
land, I believe, who prepare it. Is not that an additional 
reason why your Society should do so? We attempted it 
