Natural history -- Outdoor books; Nature; Nature study; Paris (France) -- Description and travel
A shifting
of the plane of the wings would, however, in all probability, give some
impetus: the question is, would it be sufficient? I have seen hawks go
up in sunny and lovely weather--in fact, they seem to prefer still,
calm weather; but, considering the height to which they attain, no one
can positively assert that they do or do not utilise a current. If they
do, they may be said to sail (a hawk's wings are technically his sails)
round half the circle with the wind fair and behind, and then meet it
the other half of the turn, using the impetus they have gained to
surmount the breeze as they breast it. Granting this mechanical
assistance, it still remains a wonderful feat, since the nicest
adjustment must be necessary to get the impetus sufficient to carry the
birds over the resistance. They do not drift, or very little.
My own impression is that a hawk can soar in a perfectly still
atmosphere. If there is a wind he uses it; but it is quite as much an
impediment as an aid. If there is no wind he goes up with the greater
ease and to the greater height, and will of choice soar in a calm. The
spectacle of a weight--for of course the hawk has an appreciable
weight--apparently lifting itself in the face of gravitation and
overcoming friction, is a very striking one. When an autumn leaf parts
on a still day from the twig, it often rotates and travels some
distance from the tree, falling reluctantly and with pauses and delays
in the air. It is conceivable that if the leaf were animated and could
guide its rotation, it might retard its fall for a considerable period
of time, or even rise higher than the tree.
COUNTRY LITERATURE
I
THE AWAKENING
Public-domain text, read in full here on John Shaqi.
Reviews
Reviews
No reviews yet
Be the first to share your thoughts on this work.
Elsewhere in the archive
Join the Discussion
Join the discussion
Sign in to leave a comment or review.
Sign InorCreate an account