THE AQUARIUM 
Issued in the Interests of the Study, 
Care and Breeding of Aquatic Life 
Published m. nthly except July and August 
at 12th Street, cor. of Cherry, Philadelphia, 
by th: Aquarium Societies of Brooklyn, 
Chicago, New York and _ Philadelphia 
Send all manuscripts, exchanges, books for 
review, etc , direct to the Editor-in-chief; 
all other matter to the Business Manager 
Epiror-1n-Cuier, EUGENE SMITH 
Bank for Savings Building, Hoboken, N.]. 
Business Manacer, W. F, DEVOE 
Box 383, Baldwin, Long Island, N. Y. 
SUBSCRIPTIONS, $1 SINGLE Copies, 10c 
Advertising Rates upon Application 
JUNE, 1912 
Vou. I No. 3 
Ordinarily the mention of the word 
aquarium suggests to the hearer a “‘glass 
fish 
simple a definition as one can get from the 
case with in’ and this is about as 
uninitiated. While this is true, of course, 
and in a measure a definition for the be- 
ginner, still it is only a partial truth, as 
after having exhausted all fish possibilities, 
the thorough aquarist has only begun his 
work. 'There.is the life of the insect world, 
the crustacea, the mollusks, and all the 
minute forms of life, including that of the 
micro-organisms, not to speak of the other 
half of the organic world, that of. the 
plants. 
As many of our friends are in the habit 
of spending extended summer vacations 
at small lakes, they could get much pleas- 
ure for themselves as well as furnish much 
instruction to others and even help augment 
the knowledge of aquatic life to no in- 
considerable degree, by making systematic 
neighborhood surveys of their places of 
retreat and recuperation. In these days of 
research, no field of human endeavor is 
barren and no one is so-insignificant as not 
to be akle to contribute his mite to the pile 
of facts from which later thé great truths of 
are - evolved 
science by -more » masterful 
minds. 
One form of such research is that of 
plankton investigations, which may _ be 
readily made by any one with some spare 
time. 
Sojourners along lake and shore may 
get as much recreation out of this sort of 
occupation as out of angling or gunning for 
sport. As the camera has very largely dis- 
placed the gun, so may the plankton net 
take the place of the rod and reel. 
We should be pleased to hear that some of 
our members or friends would undertake 
such work this coming summer and give us 
the benefits of their experiences. Who will 
do so? 
In order to insure earlier publication, 
the editor asks contributors and business 
managers to have all matter reach him by 
the 5th of each month. Hereafter there 
will be no more copyright illustrations 
used, unless it be cuts used for advertising 
purposes only. 
The subject matter as well as illustra- 
tions are offered for public use. The only 
request we make is that proper credit be 
given to both author and magazine by 
those who may reproduce any of our ar- 
ticles. We want to get the widest possible 
With the June 
number we reach our time of rest as a mag- 
publicity for our subject. 
azine and trust that the summer may be 
productive of many new ventures resulting 
in renewed activity on the part of all for 
the coming fall season. 
A CORRECTION.—On page 16 of 
the May number, insert the following line 
between lines 10 and 11, first column: 
Little Falls. a 
miles above Once in 
The oldest known indications of fishes 
are some small spines or teeth found in 
Lower Silurian deposits in Russia. 
In the Upper Silurian, fossil fishes are 
very plentiful, but it is only in the Upper 
Cretaceous deposits that the modern type 
of fishes becomes known. 
