SCIENCE—ADVERTISEMENTS 
VII 
SCIENCE 
M WEEKLY JOURNAL DEVOTED TO THE 
ADVANCEMENT OF SCIENCE 
■> Entered in tlie post-office at Lancaster, Pa., as second 
-..'.an matter. _ 
TERMS OF SUBSCRIPTION 
Five dollars annually in advance : single copies, 15 
sents. Subscriptions, changes of address and adver- 
fdsements should be sent to Science, 41 North Queen 
Street, Lancaster, Pa., or Sub-station 84, New York, 
ar Garrison, N. Y. 
AD VERTISINO RA TES 
One page. 
....$18 
Preferred position. 
.... 27 
Outside cover. 
.... 36 
DISCOUNTS 
48 pp... 
-. 374 “ 
2 pp.. 
..25 
a pp... 
1 P .. 
16} 
12 pp... 
...33} “ 
i p... 
..10 
3 PP - 
i P ••• 
.. 6 
Published every Friday by 
THE SCIENCE PRESS 
(Lancaster, Pa. Garrison, N. Y. 
Sub-Station 84: New York 
MARINE BIOLOGICAL LABORATORY 
WOODS HOLE, MASS. 
Biological Material 
1. Zoology. Preserved material of all types of animals 
for class work and for the museum. 
2. Embryology. Stages of some invertebrates, fishes (in- 
EUROPEAN 
APPARATUS 
The high quality of Scientific Apparatus 
for Physics and Electrical Engineering as made 
in Great Britain and on the Continent, com¬ 
bined with advantageous prices due to the 
“ Duty-Free” provisions of onr tariff, often 
make it advisable for Educational Institutions 
to purchase equipment in Europe. 
It is onr business to assist scientists in 
their “Duty-Free” importations. To this end 
we are. prepared to supply original catalog 
matter from the best makers, and (when de¬ 
sired) will suggest instruments which we have 
found best for certain purposes. This service 
saves our clients a lot of time in securing 
necessary information. Further, and this is 
a unique feature of the “ Biddle Service,” 
we maintain a Permanent Exhibit of apparatus 
from such representative makers as Siemens & 
Halske, Otto Wolff, Cambridge Scientific In¬ 
strument Co., etc. This is well worth visiting 
and experience shows that when possible it is 
better to see the “ real thing ” than to depend 
only on meagre catalog descriptions. When it 
comes to the actual handling of orders our re¬ 
sources are the result of many years specializa¬ 
tion, with efficient service to our oustomers as 
the goal. Because we are able to place a con¬ 
siderable volume of business each year with the 
different makers they allow us a small commis¬ 
sion, and therefore our services really cost the 
Consumer nothing. 
In short the “Biddle Service” for “Duty 
Free” importations, aims to be Efficient Ser¬ 
vice ; that is to save time, trouble and money. 
-Hnw.ml! ha-va-en cceed ed c an best he told 
