How to obtain it. 



183 



other. As soon as the eggs will bear moving, the grilles may be 

 lifted from the hatching-boxes and placed in a compact storage- 

 box, the working of which is explained by the accompanying 

 woodcut. This box is divided into compartments, each holding- 

 four grilles, or, if the grilles be placed directlv on each other, six 

 of them may occupy the same space. The compartments, it will 

 be seen, are so arranged that the water enters each at the bottom, 

 rises up through the grilles, and keeps the ova in sound healthy 

 condition. This box I designed in the early days of fish culture, 

 and have since used it successfully both for ova and fish. It was 

 honoured by a medal at the Yorkshire Exhibition held at Leeds 

 in 1875, where the design was applied to a series of aquarium 

 tanks, for which purpose it answers admirably. I had it in use in 

 1870, and about the same time it was patented in America. 



Fig. 20. 



