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Subsequently larger quantities were successfully hatched 
in the Chase jar. 
The Commission has made several fish exhibits, embrac- 
ing nearly all varieties of native fish, at the State Fair and 
the Detroit Exposition, and elsewhere. These exhibits 
were comparatively inexpensive and were very attractive, 
and proved valuable aids in disseminating knowledge of 
fish and fishculture. The Report of 1890 was the first 
illustrated Report issued. It contains cuts illustrating the 
hauling of the seine, and the stripping of fish, and interior 
and exterior views of the hatcheries, and of the ponds and 
grounds at Paris, which added much to the attractiveness 
of the Report. 
Some attention now began to be given to scientific work, 
and Prof. Jacob Reighard, of the University of Michigan, 
began his investigation of the development of the wall- 
eyed pike. The motive that first led to this investigation 
was the discovery of the cause of the large percentage of 
loss in hatching the eggs of this fish, as compared with 
those of the whitefish. He made extended microscopical 
examinations and accompanied the men in the field and 
followed the eggs to the hatchery and watched their de- 
velopment and hatching. He reduced his observations to 
writing, furnishing an article of upwards of 60 pages, with 
microscopical drawings, which was published in the Ninth 
Report, with platesand drawings. Thisarticle is regarded 
as a most valuable contribution to the literature of fish- 
culture and has been in great demand. Prof. Reighard 
also conducted like experiments with whitefish eggs. He 
also accompanied the crews for examination of waters with 
his microscopes and an assistant and a botanist, and made 
quite extensive examinations of the fish food and aquatic 
plants, and incidentally of some fish parasites. He also 
prepared a still more elaborate article on the develop- 
ment of the embryo of the wall-eyed pike, covering about 
eighty pages, which with the plates illustrating it are pub- 
