| Transcript |
- one or both parents are feeding.
Size of [male symbol] territory is dependent upon
food potential of the immediate habitat.
[male symbol]'s are often polygamous + after the
eggs are laid in one nest, it will set
up a new territory + attempt to attract
another mate.
He has some ingenious mechanical
devices for measuring nest activity.
[DIAGRAM]
pin hinge, glass vial, oil, mercury, terminal, terminal [text in diagram]
to battery + to counter or chimograph [text in diagram]
For just counting frequence [frequency] of feeding visits
etc [etcetera] he uses a telephone counter. They
are very inexpensive gadgets operated by battery by
an electromagnet.
Another apparatus he had was a
simple wooden arrangement for demonstrating
the operation of the fish respiratory motions
[DIAGRAM]
cords, solid, solid, solid, pin hinge at both ends, cord, coraco arcuales [text in diagram]
I am not sure that the action of this is quite
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