120 
Aquatic Lite 
addition to the illustration of 7. h. meeki, 
one is presented of C. steidachneri. 
The generic name Thorichthys is from 
two words meaning “to leap” and “fish ;” 
hence “leaping fish” in allusion to the 
playfulness of the species. 
Society News 
At the meeting of the Essex County 
Aquarium Society, held March 15th, Mr. 
William Tricker gave a talk on water 
lilies, their history, culture and hybridi- 
zation. Particular attention was given to 
the species suited to small ponds and 
tubs. 
An interesting lecture on micro-organ- 
isms was given by Mr. H. A. Van Cott 
at the April meeting. He dwelt mainly 
on the trematode parasites that make life 
miserable for aquarium fishes. 
In view of war time conditions the 
spring exhibit will be omitted, but a pub- 
lic exhibition will be given during the 
fall—Publicity Committee. 
AE See 
The annual dinner of The Aquarium 
Society was held at Pabst Harlem, New 
York City, on April 2oth, with Profes- 
sor John Treadwell Nichols as toast- 
master. Mr. William Beebe, Director of 
the Tropical Research Station of the 
New York Zoological Society in British 
Guiana, gave a talk about his work, il- 
lustrated with lantern slides. Mr. Rich- 
ard Dorn, president of the Society, gave 
an outline of the objects and work of 
the organization. 
The Dinner Committee was composed 
of Messrs. Hugo C. Nelles, Hans For- 
briger and C. B. Rush. 
The April meeting of the Philadelphia 
Goldfish Fanciers Society was held on 
the 17th, at 804 Girard avenue. Compe- 
tition for Japs, scaled and __ scaleless. 
Judges, J. E. Van Stavern, F. €. Leff- 
man and G. B. Smith. 
Awards. The Charles J. Hannig Cup 
to H. J. Mackrell; blue and red ribbons, 
George FE. Wilt; yellow, Dr. L. W. Reh- 
bein. Sealed Japs: Blue and yellow 
ribbons, Dr. L. W. Rehbein; red, Charles 
Hinkle. 
New members: 
George Jackson. 
Election of officers resulted as follows: 
President, Harry P. Peters; vice-presi- 
dent, Thomas Ayling; secretary and 
treasurer, Fred Richardson. Board of 
Directors, George B. Smith, George E. 
Wilt, Dr. F. C. Leffman, Francis Garcia 
and Dr. L, W. Rehbein. 
The competition at the May meeting 
will be open to all breeds of goldfish. 
The prizes will be donated by the mem- 
bers and will be awarded to the best fish 
in each class—FrED RICHARDSON, Sec- 
retary. 
Walter Waeltz and 
—~—__ 
(Concluded from Page 118) 
Air Products Co., which has service sta- 
tions in all the- large cities. The size 
costing $2.co furnished sufficient oxygen 
for eight aquaria for ten weeks, making 
the cost two and one-half cents per 
aquarium per week. A larger cylinder, 
costing $4.00, contains two and one-half 
times the quantity of oxygen and is 
therefore more economical. 
We have convinced ourselves beyond 
all doubt of the practicability and ef- 
ficiency of the scheme, not to mention 
the advantages of the low cost of opera- 
tion. Its effect was particularly notice- 
able in the case of two aquaria stocked 
with Cichlasoma facetum and Tetra- 
gonopterus rutilus. All efforts towards 
cleanliness, notwithstanding, these were 
always murky, with a scum on the sur- 
face of the water. A few days of oxy- 
gen transformed them into healthy, 
crystal-clear tanks. 
Air consists of approximately four 
parts of hydrogen to one part oxygen. 
It follows that when using pure oxygen 
instead of air, but one-fifth the quan- 
tity should be used, the releasers being 
made smaller accordingly. 
