114 Thirty-fifth Annual Meeting 
of the Bureau devised this little scale or measuring trough. 
(Exhibiting scale.) It is just six inches long. You lay in just 
one line of eggs, and when it is just full you can easily get the 
diameter of each egg actually or the number of them to the inch. 
You can study the growth of trout eggs with it also. We tried 
ten selected lots and tried them when a day or two old, and again 
when eyed and we found a less number contained in the trough 
at the eye stage than when they were first water-hardened. It is 
interesting in several ways. Of course where you are measur- 
ing eggs in hundred million lots, hke the whitefish and pike- 
perch eggs, if there is an increase in the size and you use the 
same measure in measuring eyed eggs, you are not measuring 
them accurately. 
This really came up in connection with our trying to estab- 
lish standard measures. I find there is a chance for improving 
our measure on some of the smaller eggs. When you get quarts 
of these fine eggs you can make a great deal of difference in 
total output by a very shght variation, and no two fish culturists 
will measure a quart of eggs alike. It is almost impossible for 
the same fish culturist to measure two quarts accurately. Now 
this diagram is not complete, because we could not get the whole 
scale onto this sheet. 
3ut it is made on the basis of the actual count of whitefish 
eges. We know the actual diameters of the eggs, which were 
counted by measuring several eggs in this little trough. 
Fish £99 Measure. 

