American Fisheries Society. 71 
inches in length were received in good condition last January, 
and were placed temporarily in a pond of comparatively small 
area. In April they were divided into three lots and transported 
to as many ponds. One lot in Pond 17, so called, succumbed to 
heat at a temperature of 86 degrees. None of the fish have yet 
been known to spawn. 
APPARATUS AND EQUIPMENT. 
At the various stations where eggs of the salmonidae are 
developed it has been observed that there is no uniformity in 
hatchery equipment, and for various reasons a standard width 
of 14 inches inside measure for hatching troughs has been adopt- 
ed by the Bureau of Fisheries. It is believed that the adoption 
of uniform measurements in all standard equipment of trout 
and salmon hatcheries, whether private, state or government 
property, would result in a material saving in the cost of con- 
struction, and also in the operating expenses. 
The adoption of a standard width for troughs is a forerunner 
to the establishment. of uniform dimensions of hatchery trays 
and other equipment subject to variations made necessary by 
local conditions. In this connection it is observed that while 
asphaltum paint is used for troughs and interior equipment at 
a majority of fish cultural stations, there are stations where the 
troughs are successfully used without paint, and others where 
lead paint on the inside of troughs is successfully used. 
Experiments are now being conducted to ascertain just 
what material is most practicable from a fish cultural and eco- 
nomical standpoint. For exposition purposes, where clear water 
is available, the use of bath tub enamel in wooden troughs has 
been found efficacious, as the fish and eggs can be more plainly 
seen. No deleterious effects resulted from its use. 
At stations where they are not constantly in use the applica- 
tion of bath tub enamel on the inside bottoms of rusty transpor- 
tation cans has been found efficacious. In the car service, how- 
ever, where the cans are almost constantly wet, the enamel soon 
becomes soft. Last year 500 cans with enameled bottoms were 
purchased; after two or three trips the enamel softened and 
rubbed off. An enamel or light colored paint that will stand 
continual moisture would be of great value for painting the 
