12
J . E. SHELBOURNE
halves were further sub-divided by crosa partitions into five compartments, each containing a movable wooden box with a fine-mesh
fabric bottom. The leading upper edge of each box was fastened to
the nearest cross partition with flexible leather tags, in such a fashion
that cutaway portions in the top edge of the box coincided with similar
SUPPiY
Connecting
Pocket
groove
Transverse
Rocking
Longitudinal
lug
incubator
r o d
I
I
1 m e t r e
FIQ. 2. The Dmnevig fish egg incubator. (After Dmnevig, 19lOa.)
grooves in the cross partitions. The complete assembly was mounted
with the upper supply end slightly raised.
When the trough was full of sea water, the movable boxes, being
buoyant, pivoted on their hinges, lifting the trailing edge. Water ran
from the upper supply pockets into the top box through the coincident
grooves in the top compartment and box wslb. It then prtssed freely
into the surrounding compartment through the fabric bottom of the
box; from there into the next lower box, to its compartment and so