ert / = 
Notice to Reader.—When y reading 
= Spe gears place a 1 cent stamp on thisn notice, 
@ magazine, and it will be placed in the 
peer a our soldiers or sailors 
wrapping—-No Address. 
SCIENCE 
New Sexes SINGLE CopPrEs, 15 Ors. 
Vou. XLVIII No, 1252 Fripay, DECEMBER 27, 1918 ANNUAL SUBSCRIPTION, $5.00 
New Optical Apparatus 
— an Announcement 
With the cessation of hostilities we are enabled to direct our 
attention to the long-contemplated development of several new lines 
of sSeeae instruments, hitherto unproduced in America. These 
include: 
ABBE REFRACTOMETER 
ABBE REFRACTOMETER 
with “dry substance” or sugar scale 
DIPPING REFRACTOMETER 
SACCHARIMETER 
for commercial or factory use 
DUBOSCQ COLORIMETER 
In the development of this new apparatus our scientific and tech- 
nical staffs are collaborating closely with American authorities on 
these instruments for the purpose of meeting every requirement in 
the most satisfactory manner possible. Furthermore, our greatly in- 
creased manufacturing facilities, now being gradually released from 
their important wartime activities, will enable us to solve the prob- 
lems of quantity production as soon as the readjustment to a peace 
production basis can be accomplished. 
It will of necessity require some time for us to place these new 
lines definitely upon the market. In the meantime, by subsequent 
announcements, we shall keep our patrons informed as to our progress. 
Bausch £3 Jomb Optical ©. 
409 ST. PAUL STREET ROCHESTER, N.Y. 
New York Washington Chicago San Francisco 
