American Fisheries Society 95 



Two other tests, made at the same time and under exactly 

 similar conditions, with the same number and size of eggs, 

 showed increases of 12.68 and a trifle over 11.75 per cent. 

 Great care was used. Air. Lambson states, to have "struck" 

 measure of the dipper in every instance, and the count of 

 eggs, to the ounce also was carefully made. 



The same plan of observation was followed at the Battle 

 Creek and Mill Creek, California, stations, with full con- 

 tirmation of the results obtained at Baird. From six differ- 

 ent lots of eggs an average increase in bulk of over 10 per 

 cent' w^as recorded. In one case it ran as high as 16^]^ 

 per cent. 



LAKE TROUT. 



Lake trout eggs have been tested for increase in size at 

 Dulutli and at Northville. At Duluth. on November 19, 

 1907. a quart of green lake trout eggs was selected as nearly 

 as possible for uniformity of size. These eggs were divided 

 into two equal lots one of which was counted and found to 

 contain 2,869. The other lot was placed on a separate tray. 

 Whenever an egg of the first lot died it was removed and 

 replaced b\' an egg from the second tray. (3n February 19, 

 when the eye spots were first visible, it was found that only 

 2,694 eggs were required to fill a pint measure, thus showing 

 an increase in size of 6 per cent. Just before hatching, ^Vpril 

 11, the eggs were again measured, but showed no further 

 increase. 



Sui>erintendent Clark states that at the Northville station 

 lake trout eggs are found to increase in size from the green 

 stage to just before hatching from 215 to 185 per fluid ounce, 

 i. e., 14 per cent. 



BLUEBACK SALMON. 



A lot of l)lueback salmon eggs, according to Superinten- 

 dent Hancock, of Yes Bay, Alaska, at the completion of 

 water hardening measured 4,416 to the cpiart. Five weeks 

 later the same eggs measured 4,160 per quart, and at ten 

 weeks of age they had increased approximately 9 per cent, 



