TRANSPORTATION OF THE EGGS. 29 



to complete the process of incubation, that they 

 may be safely conveyed from one end of our 

 country to the other. I had intended to send 

 some eggs of the brook trout (salmo fontinalis) to 

 France last fall, and to obtain some European 

 species in exchange; unforeseen obstacles pre- 

 vented me from so doing, but this year I expect 

 to consummate this exchange. 



Various methods have been adopted -by dif- 

 ferent individuals for the transportation of the 

 fish eggs. Gehen & Kemy procured tin boxes, 

 pierced with small holes; in these they put first 

 a layer of wet sand, about half an inch deep, 

 then on this sand a layer of pebbles, about the 

 size of playing marbles; in the interstices of 

 these pebbles they placed the eggs; next they 

 put in another tier of pebbles, and again filled 

 the interstices with pebbles, and so on, until the 

 box was filled. , . 



M. Costa, whose experience and observations 

 give great weight to his opinions, objects to this 

 method, for the reason that, in consequence of 

 the perforations, the box becomes dry, and while 

 the box is in transition from one place to another 

 it will necessarily be more or less jolted and 

 jarred, and the weight and motion of the pebbles 

 will crush and destroy the eggs. He advises the 

 following method, which, perhaps, is the best one 



