98 Thirty-niiilh Annual Meeting 



Superintendent Robinson, of the White Sulphur Springs 

 station, in West Virginia, has made careful tests with a 

 graduated glass pipette vertically |)laced to determine the 

 water displacement, and hnds a slight decrease in the size 

 of rainljow trout eggs during the period of incubation. 

 Superintendent Seagle's measurements, at Wytheville, Vir- 

 ginia, indicated a slight increase — a trifle under 1 per cent — 

 while at lu-win, Tennessee. Mr. Keesecker. using the Non 

 Ba}-er scale, showed aljout the same slight increase as at 

 Wytheville. 



It thus seems to be shown that for practical purposes there 

 is \ery little or no increase in the size of rainbow trout eggs 

 during the period of incubation. The peculiar character of 

 these eggs at a certain stage, however, makes measurement 

 difficult and suggests the need of further study of the 

 subject. 



Steelhead trout eggs ha\e l)een carefully measured by 

 Superintendent O'Malley, at the Baker Lake, Washington, 

 station, and showed an increase of 9 per cent. A similar 

 increase was observed alscj at the Bozeman, Montana, sta- 

 tion by Dr. Henshall. 



LOBSTERS. 



Lobster eggs show a greater increase than am- (^f the fish 

 eggs. At the Gloucester. Massachusetts, station Superin- 

 tendent Corliss noted that between February 6 and May 1 a 

 given lot of lobster eggs increased from 11 to 13'^ ounces — 

 over 20 per cent. It is a ])eculiar fad that a few da}s before 

 hatching lobster eggs swell to tln^ee times their original size. 

 The variation in the size of good lobster eggs, e\'en from the 

 same parent, is often (|uite remarkable, some being three 

 times as large as others. Superintendent Hahn. of l)oolhba\- 

 1 larbor, Maine, states that the increase in bulk during incu- 

 bation is not so noticeable at his station as Mr. Corliss has 

 found it at Gloucester, l)ut Mr. Hahn's experience shows an 

 increase N-arvint*- from 3 to 15 i)ei- cent. 



