[15] PROPAGATION OF WHITEFISH AT NORTHVILLE, MICH. 567 
_thus showing a good impregnation. The fish, though, were not yet 
dead, as the air was down to 33°, in which temperature they will hold 
their vitality much longer than in air at 45° to 60°. However, a good 
percentage of impregnation can be obtained with a live male, if female 
has been dead three or four hours; but, if the case is reversed, a very 
small percentage will be fertilized. All eggs gathered to-day were de- 
posited in floating boxes. 
November 14.—High wind and frequent squalls. Plenty of ripe 
females, although about one in four is spent; but males, not spent, are 
quite scarce. Probably about one in six of the females yet unripe. Eggs 
consigned to the floating boxes. 
November 15.—As milters were in the minority, the experiment of using 
a less quantity of milt was tried. The eggs were crowded from one 
large and one small female and the wmilt from two small males 
immediately mixed with them; they were then set aside and treated 
the same as those known to be sufficiently milted; about 10 per cent. 
died within twelve hours. There were about 50,000 eggs to be impreg- 
nated with not more than six drops of milt—enough, perhaps, under 
favorable circumstances, but the males used in this instance had been 
dead a few moments, or long enough so that the milt, instead of being 
emitted in jets, as usual, had become sufficiently hardened to be ex- 
pelled only in drops or clots, which required considerable stirring with 
the eggs to effect a complete solution and diffusion. 
November 16.—Snow-squalls and cold westerly winds. Lake rough; 
no pounds lifted. Messenger arrived from Northville, via Sandusky, 
with empty egg cases. 
November 17.—Best day of the season as regards number of eggs ob- 
tained ; over one and one-half million secured from all sources. Eggs 
on hand at North Bass taken to Put-in Bay in the evening and placed 
in warehouse at dock; temperature cf room 28°; cases covered with 
blankets. 
November 18.—Temperature of room this morning 25°; temperature 
inside the cases, 31°; eggs unharmed, though many were incased in a 
thin shell of ice, which, upon being taken in the hand, would roll from 
the egg, leaving it moist and perfect in form. Mr. Bower procecded to 
Northville, via Detroit, having in charge nearly three and one-half mill- 
ion eggs arranged in six cases. No pounds lifted to-day. 
November 19.—Wind high and very cold. Boat and rigging coated 
with ice. Eggs in pans soon freeze; frequent changes of water and 
motion of boat prevented ice from forming in the pails. 
November 20.—One pound lifted at North Bass, but lake was so rough 
and boat so icy that no eggs were taken. 
November 21.—High winds, no pounds lifted. Ice forming in the lake. 
November 22.—Fishing practically stopped; fishermen taking up nets 
as fast as possible and d—(enounc)—ing the weather and season in very 
vigorous language. Many nets destroyed. Navigation from islands, 
via Detroit, closed. 
