li SCIENCE—ADV ERTISEMENTS 
Waaaansaanasaaaa. a 
AUADLaTENgaanoGs 
PabaNbasnanagsa 
aie 
See) _—_ 
ERECTED 1906 ERECTED 1912 
A Few Words Regarding Progress in the Leitz Optical Works 
Increase of Staff. The above cut of our factory is for the purpose of illustrating the enlargement it 
has recently undergone. The fact that our working staff has been almost doubled since 1906 is a convincing 
proof of the steadily increasing demand for Leitz Microscopes. To date more than 150,000 Leitz Microscopes 
and 65,000 Leitz Oil Immersion Objectives satisfy the same number of microscopists throughout the world 
(our annual output at present being about 15,000 microscopes). 
Handicap by Volume of Orders. We will, without hesitancy, admit that the large demand made 
upon us during the past year has caused unavoidable delay in filling orders in some instances and we there- 
fore wish to offer a few words of explanation. Pending the completion of the new wing of our factory, space 
was limited for the accommodation of the additional number of workmen and facilities with which to keep 
pace with the large volume of orders. Now that our factory has been enlarged considerably, as shown in 
illustration, we aim to please our many friends in the future by resuming the same promptness which has 
characterized our imports previous to the period mentioned. 
Increase in Efficiency. The ever-increasing demand for our microscopes, etc., naturally means an 
accordingly large output, and we desire to impress on the minds of our patrons that the well regulated 
system in our factory makes it impossible for the precision in optical and mechanical workmanship to suffer. 
(This cannot be said of factories where the so-called automatic system of turning out instruments is adopted. ) 
Our Scientific Departments are unceasingly devoting their efforts to increase optical and mechanical 
precision. 
Why Leitz Products Excel. We have been called upon to explain before, and now wish to state 
again, why our products have gained their world-wide reputation and always are excelling other makes. 
Our Scientific Departments have established what is termed the ‘* Leitz Standard”’ of precision in optical 
and mechanical workmanship. These departments follow the all-important principle to increase the ‘* Leitz 
Standard ’’ with each advance in optical science. 
Uniformity of Precision. With these adopted methods, the testing laboratory in our factory 
will not pass any struments or optical parts which do not come up to the ‘* Leitz Standard.’’ Sucha 
system guarantees each objective, ocular or mechanical part to be absolutely of the same degree of perfection. 
From this explanation every microscopist will readily conclude that a Leitz Instrument brings with it 
the assurance that it embodies the highest degree of optical and mechanical workmanship the Advanced 
Microscopical Science provides for. 
No Sacrifice of Workmanship for Sake of Low Prices. Our careful methods of manufacturing 
scientific instruments do not allow us to follow the aim of placing upon the market our microscopes at as 
low prices as those of others. It is easy to reduce selling prices by sacrificing quality and it should readily 
appeal to the microscopist that his additional investment in a Leitz Microscope will be fully repaid. 
New Products. Among recent productions are STANDS II L and II O, improved and moderate 
priced microscopes for students’ use. They have been adopted in most of the leading institutions within 
the last year. Leitz Apochromatic Objectives, now constructed under revised optical data, are de- 
clared by authorities as superior to all others and considered the standard in a number of Government and 
Educational Institutions, after most critical comparison with those Apochromats of other manufacture. The 
Leitz Side Fine Adjustment is the greatest feature ever added to a microscope stand. 
Any suggestions from the scientific world will gladly be accepted and followed up in our scientific 
departments. 
In closing we wish to extend our sincere thanks for the confidence placed in us by our many friends, 
and await opportunity to reciprocate when next you call upon us to serve you. 
U. S. NEW YORK 
BRANCH 30 East 18th St. 
