304 
Original Communications. 
imperfect filtration, been evaporated with it and thrown into 
the market, without due attention on the part of the head 
manufacturer. 
We are aware of the objections that suggest themselves to 
this view, from the distinct acicular crystals which the sul- 
phate of quinine will form — generally indicating, if any, the 
presence of foreign matter. But in addition to the close ex- 
amination which we have given the subject, the circumstance 
of its bearing the seal and label of a respectable house in- 
duces us to suppose it may be either the result of great care- 
lessness or wilful imposition, first practised upon M. Delondre 
himself by the operative chemist whom he employed for this 
product. 
A similar kind of imposition occurred with a very respect- 
able house in this city, by their placing entire dependence for 
the purity of a vegetable alkali, upon their foreman, by whom 
they were deceived. We hope these circumstances will 
prove how cautious the manufacturers should be in the choice 
of those to whom they confide their operations, and how care- 
ful in testing all the products prepared by other hands in their 
employ ; otherwise they will find the reputation of their es- 
tablishments will suffer considerably by this want of proper 
attention ; for it is the determination of our apothecaries to 
expose all impure articles that may be found in the market. 
Charles Ellis,"! 
E. Durand, y Committee of Inspection. 
John C. Allen, J 
Philadelphia, 12 Mo. 22, 1835. 
