682 KANSAS CITY REVIEW OF SCIENCE. 



Legislature provided for the establishment of a fish hatchery at Milwaukee. Un- 

 der competent management, the institution has proved a great success, and every 

 year from 10,000,000 to 20,000,000 of young whitefish are turned into Lake 

 Michigan by the hatchers. Careful observations show that the young fish thrive 

 wonderfully, and it will not be long until the supply of commercial whitefish will 

 be greater than ever in Lake Michigan. The same hatchery also turns out mil- 

 lions of lake trout every year. This is a much hardier fish than the whitefish, and 

 its growth is very rapid, but it is not so highly prized as its more delicate neighbor. 

 Within the last two years the propagation of land-locked California salmon has 

 been attended with gratifying success at the Milwaukee hatchery, and it is thought 

 that this valuable fish may become acclimatized in the waters of the Mississippi 

 Valley. 



In Michigan, Minnesota and Iowa, as well as Wisconsin, much attention 

 has been paid to the propagation of brook trout, and the cold-water streams of 

 these States are gradually being stocked anew with that delicious fish. It has 

 been found, by experiment, that the whitefish and the lake trout of the great lakes 

 will thrive and increase in the inland lakes of the Northern States which have a 

 depth of fifty feet. These species could hardly be expected to endure the greater 

 warmth of our Missouri summers, but there are others which can be propagated 

 with equally gratifying results, that would, if placed in our running streams and 

 small lakes, add greatly to the natural wealth of the State by vastly increasing our 

 supply of cheap and wholesome food. No State can be too liberal in dealing with 

 this question. There is no other form of animal food that costs so little as fish, 

 and very few that are so nutritious and desirable. We have many streams in this 

 state that might be stocked with food-fishes adapted to our climate at small expense. 

 We are glad to note that our Fish Commissioners are alive to the importance of 

 this subject. They have recently stocked a few streams with young fish procur- 

 ed from Wisconsin, and we have no doubt they would accomplish much more if they 

 were not hampered by the want of funds. We trust that the next Legislature 

 will make up for the shortcomings of the last in this matter. — St. Louis Globe- 

 Democrat. 



PHYSICS. 



CAUSES OF ARTESIAN WELLS. 



It has been reported that at Champaign, Illinois, an inexhaustible supply of 

 water has been discovered twenty-seven feet below the surface, and that, on being 

 probed, it overflows at the surface of the earth. Quite similar instances, in va- 

 rious parts of the country, have been numerous. The phenomenon proceeds from 

 the same general cause that sends the millions of springs of water bubbling forth 

 through superficial crevices, and makes some wells constantly overflow. The in- 



