356 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
as the hatching-troughs. It is of 12-inch stuff and the sides and bottoms are of the 
same dimensions. The gates are made by cutting out and resetting the block, leaving 
a space at the bottom of three-fourths inch by 1 inches. The outflow is controlled 
by a sheet-iron drop gate. A short tin spout carries water into the troughs, falling 
about 1 inches. In the double-run battery a similar spout carries the water into the 
second section with a fall of 2 inches. The troughs drop about 6 inches in their 
length. The baskets are 21 inches by 11 inches by 5 inches, of the usual material, two- 
tenths- inch by three-fourths-inch mesh. Wooden battens are secured to the two long 
sides and the ends protected by a fold of tin nailed to the battens. The corners are 
interlaced. The baskets are supported in the troughs either by the wooden battens 
or upon four small blocks one-half inch high, nailed to the bottom of the trough. 
There were 70 baskets in the house, each having a capacity of 50,000 eggs. 
The stock fish are seined in the lake and kept in a retaining pond until fully ripe. 
The seine used is 30 fathoms by 2 fathoms by 2^-inch mesh. The fish are spawned 
by the wet process. The spawning pans are tin saucepans, 8 inches in diameter, 
asphalted. The period of incubation is 90 to 120 days. 
I f* 'k 1 * a I t 
Sci. .( 
Sketch of Hetta Lake and Stream, Prince of Wales Island, Alaska, 
The data from this hatchery is exceedingly meager, and not reliable enough for 
record. It is said that in 1899, 2,800,000 eggs gave 2,600,000 fry (a loss of 7.11 per 
cent), but this can hardly be correct; in 1900, 1,800,000 eggs were placed in baskets. 
Very cold weather during the winter of 1900-1901 froze many of the eggs. The 
output is not definitely known. 
PETER JOHNSON STREAM AND LAKE. 
This stream is known to cannery people as one of the Moira Sound streams. In 
conducting the examination of that locality in 1897 it was missed, but it was visited 
