A METHOD OF MEASURING FISH EGGS. 



By H. VON BAYER, C. E., 

 Architect and Engineer, United States Bureau of Fisheries. 



In a well-regulated fish hatchery it becomes at times necessary to count 

 the eggs of fishes, so as to know the quantity on hand and prepare for certain 

 shipments of eggs as well as for the future care of the fry. The methods thus 



Fig. I . — Metal trough for use in determining diameter of fish eggs. 



far employed have been to determine by actual count the number of eggs con- 

 tained in one liquid quart measure, and then to multiply said number by the 

 number of quarts of eggs on hand ; or to weigh one liquid quart of counted eggs, 

 next to v/eigh all the eggs on hand, and then by simple proportion to determine 

 the number of all the eggs. 



The new method proposed by the writer is first to determine the diameter " 

 of one egg, and then to enter with the value of said diameter a table or diagram 



a By diameter is here understood the diameter of the egg including its surrounding matri.x, if any. 



lOI I 



