m 



HATCHING EGGS OF SPANISH MACKEREL. 



1091 



I then arranged tbe apparatus, of which I submit a sketch, Fig. 1. 

 It was made entirely of cedar wood and glass, but as I was only able to 

 get eggs for it once I can scarcely tell what might have been done with 



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Ta n k, 



Fig. 1. — Apparatus for hatching Spanish mackerel. 



it. The one time it was tried the result was no better than in the former 

 cases. 



Previously we had tried McDonald jars, "and a porcelain apparatus 

 Avhich I found stored at the armory, consisting of an outer jar with an 

 inner one having perforated sides and bottom. The result was much 

 alike iu all. 



I noticed that many of the young fish hatched were curved as though 

 they had never straightened out after breaking from the egg. 



Comparing what we did this year with the results of last year, 1 think 

 it will be extremely difficult, if not impossible, to do more with the 

 Spanish mackerel than impregnate the eggs and replace them in the 

 water for nature to deal with. 



I made several attempts to impregnate and hatch oysters, but soon 

 came to the conclusion that we could do nothing in that line on ship- 

 board, and was convinced from our own experiments and what I saw at 



