WHITE PEECH, SMELTS, ETC. 215 



remove the jar, rub the eggs again through a 

 tray, and return it to the battery. The period 

 of incubation is from fifteen to twenty days ac- 

 cording to the temperature of the water. 



Although living the greater part of the year 

 in salt water, smelts can be easily transported 

 to fresh water, where they will live and mul- 

 tiply. They are so numerous, for example, in 

 Lake Champlain that their catching is a l6cal 

 industry. They appear to grow more rapidly 

 and to a greater size there than in salt water. 

 The same may be said of the white perch. 

 Along the coast of Massachusetts are many 

 ponds which years ago were connected with the 

 ocean by open channels, and were favourite re- 

 sorts for white perch. Communication with the 

 sea has since been cut off, so that the white 

 perch have become land-locked; but they have 

 accommodated themselves to their new environ- 

 ments, assumed a darker hue and acquired a 

 greater size and weight. 



Suckers. A dissertation on the propagation 

 of the sucker may cause a shock to some, sur- 

 prise to others, derision from more, and pro- 

 tests from a few. One division of mankind re- 



