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 directly 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. 
