94 Thirty-ninth Annual Meeting 



occurs in the more advanced stages of the period of incu- 

 bation. 



PIKE PERCH. 



At the Put-in Bay station Superintendent Downing care- 

 fully counted and measured a lot of pike perch eggs 3 days 

 old. and found that they numbered 171,680 to the quart. 

 When fully eyed 13 days later, but 157,024 eggs from this 

 same lot could be placed in a quart measure, thus showing 

 an increase in bulk of over 8 per cent. Since that time tests 

 with the von Bayer gauge showed the pike perch eggs to 

 measure 180,000 per quart when green, and 150.000 when 

 eyed, a bulk increase of over 16 per cent. 



Experiments conducted at the Swanton, Vt.. station, under 

 the direction of Superintendent Carter, showed such an in- 

 crease that two measuring scales were adopted — one for 

 green and one for eyed eggs. The latter allowed for an 

 increase of approximately 11 j^er cent. 



CHINOOK SALMON. 



Chinook salmon eggs have been reported upon perhaps 

 more in detail than any others. During the past year Super- 

 intendent Lambson, of the station at Baird, California, made 

 some very significant tests to determine the growth of the 

 chinook eggs from the time of water hardening until they 

 were well eyed. Mr. Lambson describes his method of mak- 

 ing the tests in substance as follows : 



On November 10. 1908, 20 dippers of eggs were measured 

 into a hatching basket. The dipper was of 27 ounces capac- 

 \\\\ and there were thus 540 ounces of eggs in all. They ran 

 74 '/li to the ounce, making 40,230 eggs in the lot. On Jan- 

 uary 13. 1909, remeasurement showed 575 ounces of eggs, 

 which at the same count per ounce would have made 42,837 

 eggs. There had been a loss of 1951 eggs while in the basket, 

 which brought the number up to 44,788. The actual increase 

 in bulk, in terms of eggs counted at 74^ {. to the (^unce, was 

 thus about 4,558. That is, there was an increase in bulk 

 equal to that many eggs of the original size, or a trifle over 

 10 per cent. 



