CHAS. LENTZ & SONS 
jinnouttcement 
N compiling this catalogue we have carefully selected the micro- 
scopes which our experience has taught us are most suited to the 
physician, biologist and bacteriologist, respectively, and in the 
description we have endeavored to indicate the essential features 
of each stand which render it most suitable for any individual 
branch of work. Of those instruments that are so constructed 
that they can be used for any particular combination or for all branches of medical 
microscopy and biology, we have again endeavored to place before the reader, as 
clearly as possible, the reason for adding or discarding any particular accessory or 
for using any special form of stand or combination of objectives or eyepieces. 
By this method the prospective purchaser can at once confine himself by exclu- 
sion to a group of two or three stands, and the ultimate selection of the one most 
suited to him individually is simply resolved into a matter of cost. All instruments 
are guaranteed free from optical or mechanical defects. 
We are special Philadelphia agents for Ba«sch & Lomb Optical Com- 
pany, of Rochester, N. Y., and have a large stock of all their products always 
on hand. 
A copy of "Manipulation of the Microscope," by Mr. Ed. Bausch, accom- 
panies each compound microscope purchased, except those sold to educational 
institutions at special rate. 
In the portion of catalogue given to bacteriological and general laboratory 
supplies, we have listed only the latest and most improved forms of apparatus, all 
of the very finest quality and best workmanship, and have introduced quite a large 
number of new instruments and apparatus published for the first time with the 
issue of this catalogue. 
As we are in touch with the most prominent workers, and are well posted m 
technique, we are always in a position to advise as to the best and most improved 
apparatus and methods, and we will at all times cheerfully give our correspondents 
any information we have or that we can obtain in such matters. 
STOCK.— The apparatus, etc., listed is generally in stock and on view in our 
salesrooms and factory ; prompt shipments can therefore be made. The technique 
in present laboratory methods, however, is so varied and individual idiosyncrasies 
so predominant, that it is advisable not to keep a large stock of some particular 
classes of goods, and occasionally, therefore, there would be an exception to the 
prompt delivery of some articles. In these cases we use every effort to fill the 
order satisfactorily in the shortest possible time and advise our correspondents of 
the probable date of delivery. 
Suggestions are respectfully requested regarding new and useful apparatus, or 
improvements in same. Our experience is always at your service in developing 
an embryonic idea for a new instrument etc. 
Supplements to this catalogue will be issued from time to time, also loose 
leaves, which can be pasted at the end of catalogue for reference. 
Special apparatus of European manufacture will be imported to order only. 
Microscopes and accessories manufactured by Zeiss, Leitz or Reichert, are not 
kept in stock but can generally be supplied within three days after receipt of 
order. These goods are not sent on approval and are not returnable. 
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