16 REPORT OF THE COMMISSIONER OF FISHERIES. 
At Neosho, Mo.,a 10-inch iron supply pipe has been laid in place of 
an old wooden conduit, and supply and distributing reservoirs, new 
troughs, machinery, and appliances were installed in the hatchery. 
Further improvements to the water supply are held in abeyance pend- 
ing the acquirement of a right of way. 
At Put-in-Bay, Ohio, the capacity of the hatchery has been increased 
by the purchase and installation of 760 additional hatching-jars, and 
iron supply tanks of a total capacity of 17,500 gallons have been sub- 
stituted for the old wooden one. There have also been extensive 
repairs to the buildings and machinery. 
At Duluth, Minn., the hatchery has been wired for electricity, 460 
feet of the supply flume have been reconstructed, the crib well has 
been deepened, and material has been purchased for a new pipe line 
and reservoirs. 
At Speartish, S. Dak., sudden floods pouring down the canyon, at 
the mouth of which the station is situated, have caused much damage, 
and haye necessitated the expenditure of considerable sums of money. 
The measures originally taken to prevent such damage haying proved 
insufficient, an old protective channel has been excavated to a depth 
of 8 feet and a width of 15 feet, and walls have been constructed of 
solid masonry for a large portion of the distance, with retaining walls 
where necessary. Besides the danger of floods from the canyon, the 
lower part of the grounds, including the pond system, is subject to 
overflow from Spearfish Creek, and to guard against this, 90 feet of 
stone wall was built. This wall; however, with a new bridge, was 
washed away during the extreme high water last spring. The water 
supply has been increased by the erection of a new cement dam which 
will open up a series of springs near the head of the canyon, and the 
reservoir has been lowered 8 feet to accommodate this extra supply. 
Much grading about the grounds and reconstruction of roadways has 
been necessitated by these changes. 
At the fish ponds in Washington, which are in the park system, 
much has been done toward beautifying and improving the grounds to 
bring them into accord with their surroundings, and this work is still 
in progress. The ponds have been altered to meet the present require- 
ments, and the supply and waste-pipe system has been modernized. A 
triangular frame storage building 58 by 51 by 50 feet has been erected, 
containing much-needed workrooms and storerooms. 
At Nashua, N. H., direct connection has been made with the city 
water system for protection against fire and to afford an emergency 
supply for the ponds, hatchery, and other buildings. Sewers have been 
laid, the piping system in the hatchery augmented, and all the build- 
ings put in good repair. 
At Northville, Mich., a series of 5 ponds, covering about 3 acres, has 
been sufficiently completed to allow the propagation of small-mouth bass 
