6 REPORT OF COMMISSIONER OF FISH AND FISHERIES 



enough water to supply the necessary amount required in the hatchery, 

 and about 350 feet of G-inch iron pipe was purchased and laid from the 

 pumps, extending out into the lake about 250 feet into a depth of water 

 of about 13 feet. Tliis pipe was well anchored to the bottom, and since 

 its introduction there has been no trouble in obtaining all the water 

 required. It was found advisable to remodel the hatching apparatus, 

 etc., of this station. A new system of jar battery, hatching and rearing 

 troughs, etc., was made and erected, and the whole piping in the hatch- 

 ery was rearranged. After the remodeling of the hatchery, it was 

 found that a greater amount of work could be done with considerable 

 saving in water, which has caused a saving in fuel. 



WORLD'S COLUMBIAN EXPOSITION. 



The exhibit of the Commission at the World's Columbian Exposi 

 tion, the report covering which appears as an appendix to this volume, 

 had for some time been in complete workin g order at the opening of 

 the fiscal year. Dr. Tarletou H. Bean continued in charge as repre- 

 sentative, assisted by W. DeC. Ravenel, as chief special agent; Prof. 

 S. A. Forbes, as director of the aquarium, and other persons. 



The section of Scientific Inquiry, prepared under the direction of 

 Mr. Eichard Rathbun, contained illustrations of the marine laboratory 

 of the Commission; models of illustrations of vessels; specimens of 

 seines, trawls, nets, dredges, and sounding machine used in deep-sea 

 work; instruments used in making physical observations; a large 

 series of flexible casts illustrating, chiefly, important economic species; 

 charts and models of the ocean areas investigated, and specimens pre- 

 served in alcohol or in a dry state. 



The section of Fish-Culture was directly in charge of Mr. W. DeC. 

 Ravenel. In addition to what has already been mentioned it con- 

 tained apparatus used in modern fish-culture, as well as an historical 

 series showing the changes through which fish-cultural methods have 

 passed; apparatus for collecting and transporting eggs and spawning 

 fish; models and pictures of hatching and rearing establishments; col- 

 lections showing methods and results of fish-culture; eggs in various 

 stages of development preserved in brine or alcohol; illustrations of 

 the food and enemies, and a collection of fish-cultural literature. 



In the hatchery the eggs of the pike perch, yellow perch, and com- 

 mon sucker had all been developed, and about 7,000,000 of fry were 

 planted in Lake Michigan near Jackson Park, and elsewhere. In 

 July a consignment of eggs of the black-spotted trout was received 

 from Leadville, and 70 per cent of them were hatched early in the 

 month. Notwithstanding the high temperature of the water, the fry 

 were kept without considerable loss until an accident to the machinery 

 caused their death. 



In the Fisheries section were shown models prepared under the per- 

 sonal supervision of Capt. J. W. Collins, illustrative of vessels and 

 boats now engaged in the fisheries of lS T ew England, the Great Lakes, 



