322 
FOREST AND STREAM 
July, 1921 
ant fry were treated in the same way, 
and were unsuccessful. Grayling eggs 
hatch in ten days, whereas the period 
of incubation of trout eggs is two 
months or longer, so that work with 
grayling eggs must be done quickly. I 
found, in the first 'place, that owing to 
the greater buoyancy of grayling eggs 
it was necessary to place them in 
hatching jars, in the same way as with 
shad or whitefish eggs, until the eyes 
of the embryo appeared, when the eggs 
being then heavier, could be hatched 
on trays in a similar manner to trout. 
I also discovered that grayling eggs 
could not be shipped to any great dis- 
tance in ordinary trout egg cases, as 
they were liable to hatch en route. I 
devised a double wall, refrigerator box, 
with which, by constant re-icing, the 
eggs could be carried for any distance 
when the temperature did not rise above 
forty degrees. Millions were shipped 
in these boxes to all federal and state 
hatcheries in the neighborhood of trout 
streams. 
But the greatest difficulty occurred 
when grayling fry, but a fourth of an 
inch in length, had absorbed their 
small yolk sac. No food could be found 
small enough, not even fresh ox blood, 
to meet the requirement of feeding. 
After swimming about in the hatching 
troughs for a week or two they would 
curl up and drop to the bottom, dead, 
from inanition or malnutrition. Then, 
by microscopic examination, I discov- 
ered that, like whitefish fry newly 
hatched, their mouths were fitted for 
feeding on minute crustaceans that 
abound in all streams and lakes, and 
which form the first food of all newly 
hatched fishes. Thus the problem was 
solved, for the spring water supplied 
to the hatchery, issuing from the foot 
of Bridger mountains contained neither 
air nor food; and while aeration was 
provided artificially, the grayling fry 
simply starved to death. 
A mountain trout stream flowed 
within a hundred feet of the hatchery, 
in which a protected pool was formed, 
lined with the finest wire cloth, into 
which the fry were placed as soon as 
the swimming stage was reached. 
There was no more trouble after this, 
inasmuch as the fry obtained their 
natural food, on which they thrived un- 
til a month old, when they could be fed 
on liver emulsion in the same manner 
as trout fry. 
To meet the important and neces- 
sary requirement of a natural flowing 
stream, a large pond was constructed 
for creek water, which was supplied 
through a ditch, fifteen hundred feet 
long, from the canyon. This pond was 
connected with the nursery ponds by a 
system of iron pipes. Into these ponds 
the grayling fry were placed as soon 
as the swimming stage was reached. 
After that grayling culture was as 
simple as trout culture. Across the 
creek, and nearly opposite to the intake 
of the ditch, was a warm spring, 77 de- 
grees the year round. The wall of this 
spring was raised seven feet, so that 
the warm water was carried in a flume 
across the creek to the ditch, whereby 
In Writing to Advertisers mention Forest and Stream. Tt smll identify yon 
i i 
CALLMAC” 
Fishing Tackle 
FOR PARTICULAR ANGLERS 
FLOATING BUGS with pat. “no-slip” 
bodies 
BASS, each 65c. TROUT each 50c. 
HIGHEST QUALITY BASS AND TROUT 
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My own production. To order or 
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TROUT per doz. $2.50. BASS per doz. $3.50 
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STONELEIGH COURT, WASHINGTON, D. C. 
You Can’t Beat Natural Bait! 
Lure makers have done wondere In making 
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“You can't make a lure look more like 
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Save hours of tedious labor next trip, and 
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11-oz. jar large shiners (about 50) 50o 
6-oz. jar small shinen (about 200) 50c 
6-oz. jar frogs (six to jar) 50c 
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Money cheerfully refunded If not satisfied. 
Ferry Fish Market Co., Box B., Port Huron. Mich. 
A FLY THAT CASTS 
LIKE A PLUG 
ROACH CASTING FLIES 
leap out over the waters from 
your short bait rod as accur- 
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cocked wings the hook is 
practically weedless — an un- 
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Send for circular B, ex- 
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it at your dealer’s or send us 
75c direct and see how 
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THE ROACH BAIT CO. 
164 Barre St. Montpelier, Vermont 
FISHING TACKLE 
Deal Direct With the Manufacturer 
“ESdward vom Hofe” on an 
article of TACKLE not only 
signifies that it is good 
TACKLE but that there is 
none better. Making Tackle 
since 1867 is a recommenda- 
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Catalog No . 106 Bent on request 
Edward vom Hofe & Company 
112 Fulton Street New York City 
Hildebiandt Spinners 
Ignd 'Em when others Fail 
Your Dealer 
Sells ’Em. 
That’s why 
old-timers who 
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insist on 
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They're made in all sizes 
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Catalog telling you how to increase 
your catch free. Write for it today. 
JOHN J. HILDEBRANDT CO. 
Logansport, Indiana 
u 
JOKER” TOPS 
THE SANITARY TOP 
QUICK ACTION 
Label stays CLEAN, making it 
EASY TO READ at all times. 
It is water and dirt proof. Rest 
is finished with Five Coats of 
our Porcelain Enamel and cannot 
chip or peel off. Positively the 
finest top made. 
Greatest Fun Producer 
Take them on your fishing trips, 
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vacation. Have them at home 
for Bunko Parties, etc. 
ASK YOUR DEALER or send 
25o in coin and a 2o stamp. 
w. J. JAMISON co. 
Dept. S, 736 S. California Avenue, CHICAGO, ILLINOIS 
SALE U. S. ARMY GOODS 
For Camp and Summer Wear 
Best quality, lowest prices. Our moneyback 
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ARMY SHELTER TENTS $3.00 
Khaki Riding Breeches 3 00 
Khaki Trousers 2.50 
Flannel Shirts 2.50 
Khaki Shirts 1.50 
Camp Cooking Grates 30 
Folding Mess Pans 25 
Athletic Shirts 75 
Army Folding Cots 3.50 
Army O. D. Wool Blankets 3.50 
Army Tents, all sizes and 5000 other arti- 
cles for camps or outings. Catalogue No. 
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RUSSELL’S Army & Navy Store Co. 
245 West 42nd Street, New YorkJ 
Largest Camp and Military Outfitter J 
