16 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 
Facing the aisles are models of the Albatross and the Fish Ilawk, 
the largest vessels belonging to the Fish Commission, to which are due 
much of the present knowledge of the life in the deep waters off the 
coasts of the United States and in the West Indies. Running diago- 
nally across the section from the circular aisle of the rotunda is a 
display of the common forms of apparatus employed in marine inves- 
tigation. The beam trawl, which is spread upon the floor, is used for 
gathering specimens from the bottom. Hanging to a frame above 
the trawl are appliances used in collecting from the surface, bottom, 
and intermediate depths, such as the tangle, the Chester dredge, boat 
dredges, and surface and intermediate tow nets. 
Draped on the frame and otherwise disposed about the section are 
seines, gill nets, scoop nets, scrape nets, and other apparatus used 
in making shore collections of fishes and other organisms. The col- 
lecting tanks and chests in which specimens are preserved and trans- 
ported are shown by the side of the trawl, and adjacent to them is a 
Tanner sounding machine, with its accessory apparatus. On the walls 
in frames are examples of plates, colored and black-and-white, used 
to illustrate the publications of the Commission, and charts of the geo- 
graphical distribution of certain food-fishes, and a large map showing 
where the Commission has carried on scientific investigations. 
Under the head of fish-culture are grouped the exhibits which illus- 
trate fish-cultural work, embracing full-size forms of apparatus and 
models of all the appliances used in collecting eggs, the hatching 
and distribution of fresh and salt water fishes, and photographs, 
drawings, and charts showing the different phases of the work and 
the results of fish-culture in certain of the fisheries. From the open- 
ing of the exposition to its close, October 30, the practical work of 
hatching trout, salmon, shad, pike perch, and other fishes will be dem- 
onstrated. Suitable troughs and other apparatus have been provided 
and supplies of eggs will be received from time to time from different 
parts of the country. At the opening of the exposition eggs of the 
shad, pike perch, steelhead trout, grayling from Montana, and black- 
spotted trout were in process of hatching. As the season advances 
other eggs will be substituted. The hatching of eggs of the marine 
fishes is illustrated by artificial means, as none of the salt-water fishes 
propagated by the Commission spawn during the summer. 
Fishery products are shown in a comparatively small but compre- 
hensive display of various fishes, oysters, lobsters, clams, turtles, 
shrimp, ete., preserved by canning in various ways, and by smoking. 
pickling, and salting. The fresh-fish industries are illustrated by 
casts and engravings of the principal food-fishes, and pictures showing 
the manner of their capture. There is also a series of shells of salt 
and fresh water mollusks which are used for food or bait, and a collee- 
tion of edible crustaceans preserved and mounted. The secondary 
products of the fisheries, which are of considerable and increasing 
value, are illustrated by glues, fertilizers, oils, and isinglass. There are 
