146 
lished with the Tenth Report. He is at present inaugur- 
ating some experiments connected with the food of the 
whitefish, and its life and abundance, and when and how 
distributed, which it is hoped will be of value in determin- 
ing the proper places for planting the whitefish fry. It 
is designed to make this examination as careful and ex- 
haustive as the means at hand will allow, and it is planned 
to interest the authorities of the University of Michigan, 
to co-operate with the Commission in extending work of 
this scientific nature from time to time. No work of the 
Commission has attracted wider attention among intelli- 
gent readers than the work already done by Prof. Reig- 
hard. 
A boiler and pump were added to the Detroit hatchery 
for use in case of an emergency causing the stoppage of 
the flow of the city water, such as had been once or twice 
experienced. By this means the water in the storage 
tanks could be on short notice pumped up into the troughs 
which feed the hatching jars and keep the water circulat- 
ing through the eggs until the stoppage of the regular 
flow of the city water ceased. The storage tank capacity 
of the hatchinghouse was also nearly doubled by enlarg- 
ing the wing of the building. 
In the summer and fall of 1889, the efficiency of the De- 
troit whitefish hatchery was doubled by the erection of 
two additional frames of jars, which increased the number 
of jars in place to one thousand and fifty, with a hatching 
capacity of nearly two hundred millions; but the difficulty 
of obtaining sufficient ova to fill the jars prevented for a 
year or two reaping the full benefit of the increased capa- 
city. The whitefish plant in 1889 was sixty-three millions, 
and in 1890 one hundred million seven hundred thousand. 
The wall-eyed pike plant of 1889 was forty-four million 
three hundred and forty thousand, and in 1890 twenty- 
two million three hundred thousand. The brook trout 
plant of 1889 was two million four hundred and sixty- 
