THE PAN-AMERICAN EXPOSITION. 319 
ACCESSORIES TO HarcHIng APPARATUS. 
Aquaria: 
Receptacle, rectangular in shape, made of glass, slate, and iron; 48 inches long, 
18 inches wide, 18 inches deep; into which the fry pass from the jars as soon as 
they are hatched. The aquaria is placed in the center of the hatching-table and 
receives the fry from about 14 or 15 jars; as soon as they become crowded they are 
transferred to the fry troughs usually arranged around the hatchery. 
Hand dip-net (aluminum): 
A small net used at Central Station, Washington, D. C., for transferring single speci- 
mens from aquaria. Frame of brass wire, No. 11, American gage, 34 inches in 
diameter; handle of wood, 18 inches long; mesh of net, one-fourth and one-eighth 
inch by 6 inches deep. 
Trough net: 
Square frame of aluminum covered with fine-meshed netting and provided with 
handle for removing young salmon and other small fishes from hatching-troughs. 
White-fish dip-net: 
This net is used at Alpena Station in transferring the white-fish fry from receiving 
tanks to the transportation cans. 
Jar scaff net: 
Used for removing foreign matter from full jars of semi-buoyant eggs. Brass-wire 
frame and handle; bow] square or circular, 23 inches to 3 inches in diameter; handle 
19 inches long; netting of gilling twine, one-fourth inch mesh. 
Scaff net: 
Small square nets, with short handles of metal, for taking dirt from trout troughs. 
Siphon cage: 
Made of copper and tin. It is covered with cheese-cloth and attached to the siphon 
tube for drawing Off water from aquarium or cans containing fry. 
Siphon cup: 
A tin cup placed under the end of a siphon to keep it from breaking when the water 
gets too low in the aquarium. 
Eqg funnel: 
A shallow funnel especially designed for introducing fish eggs into the different 
kinds of hatching-jars. Netting made of gilling twine, one-fourth inch mesh, is 
advantageously used over mouth of funnel to keep scales, etc., from going into the jar. 
Tally board: Used for keeping count of trout fry and yearlings at Leadville, Colo. 
Liver strainer: 
An ordinary tin pan, with perforated bottom. The liver is passed through this 
strainer before feeding to the young fry, to insure its being thoroughly cut up. 
Perforated ladle: 
An ordinary iron cooking ladle, with perforated bowl, used in handling trout eggs 
during the period of incubation in the hatching troughs. 
Perforated dipper: Used in handling trout eggs during incubation. 
Seagle hatching-trough: Model with sliding screen instead of fixed screen in head of 
trough. Advantage claimed in cleaning trough with young fish in it. 
Egg nippers: 
Made of wood, tin, and brass, of various styles, for removing dead and unimpreg- 
nated trout and salmon eggs. 
Page’s egg scale: 
A small wooden square laid off in grades and numbers. The scale is designed to 
determine the number of eggs of any species in a McDonald hatching-jar. The grades 
correspond to one-half pint contents of the jar, and the number of eggs per half pint 
has been determined by counting 1 quart of eggs of each species. 
Measure for counting white-fish eggs: 
Devised by Mr. J. J. Stranahan, of Put-in Bay, Ohio, for counting rapidly a quart 
of white-fish eggs—applicable to any other species. 
Feathers: Used in cleaning and manipulating trout and salmon eggs. 
