New Eules in Domestic Ciecles. 



387 



the double row of boxes, and the other from the bed of the 

 rill. The superficial area of each was two hundred and forty 

 yards, being much too small, as finally ascertained, for the 

 hosts of fry with which they were ultimately tenanted. 



SECUEING THE OVA OF A SAUVION. 



The process by which a salmon is made to exude its roe or 

 milt is illustrated by the engraving ; but the abdomen of the 

 fish should be kept under water, and a napkin is better than 

 the naked hand wherewith to hold the tail. It being diffi- 

 cult to hold a salmon, three persons are frequently required. 

 But what says our authority ? 



In order to obtain the spawn in a perfectly mature state, 

 the fish were taken from the spawning-bed in the very act of 

 its deposition. They were caught with nets at night. When 

 taken they were instantly, and without injury, put into an 

 oval tub one fourth full of water. So soon as a pair of suita- 

 ble fish were captured, the ova from the female was immedi- 

 ately discharged into the tub by a gentle pressure of the 

 hands from the thorax downward. The milt of the male was 



ejected in a similar manner, and the contents of the tub gen- 

 tly stirred with the hand. After the lapse of a minute the 



