137 
Berrien county, and the only one of the old employees re- 
tained was Oren M. Chase, who had been overseer of the 
Detroit hatchery from its start. 
Up to this time a considerable plant of whitefish fry 
had been made each year in several of the inland lakes of 
the State. No extensive reports of the favorable results of 
such planting coming to the Commission, the planting was 
thereafter confined to the Great Lakes and the rivers and 
straits connecting them, and such interior lakes as con- 
tained native whitefish; and thus another undoubted 
mistake was corrected. The Commission becoming con- 
vinced that the brook trout was capable of a much wider 
range throughout the State than was formerly supposed, 
began to give additional attention to raising and distribut- 
ing this popular fish. The Fourth Report bravely sug- 
gests that not less than a million brook trout fry should 
be hatched yearly for Michigan streams. 
A few black bass were hatched and planted, and some 
experiments made in hybridization. Renewed efforts were 
also made to accomplish something for the grayling, but 
without success. 
About this time the few remaining adult California sal- 
mon were turned loose; his exit was preceded by that of 
the Atlantic salmon, and his by that of the shad, and 
thus was another mistake corrected. The land-locked 
salmon struggled along a few years later, but his name has 
since been stricken from the list. 
In the summer of 1880, the Detroit hatchery was re- 
modeled, and the last of the Holton boxes discarded and 
their places supplied with the Chase jars, giving a total 
of three hundred jars and a hatching capacity of more 
than thirty million whitefish fry. Six of these jars were 
exhibited by Prof. Baird at the International Exposition 
at Berlin, and Mr. Chase secured the “‘ golden medal of 
honor”’ for the invention. About this time the trout and 
salmon in the ponds at Pokagon began to sicken and die, 
