[Illustration: THE PANTANEMONE.]
Two plane surfaces in the form of semicircles are mounted at right
angles to each other upon a horizontal shaft, and at an angle of 45 deg.
with respect to the latter. It results from this that the apparatus
will operate (even without being set) whatever be the direction of the
wind, except when it blows perpendicularly upon the axle, thus
permitting (owing to the impossibility of reducing the surfaces) of
three-score days more work per year being obtained than can be with
other mills. Three distinct apparatus have been successively
constructed. The first of these has been running for nine years in the
vicinity of Poissy, where it lifts about 40,000 liters of water to a
height of 20 meters every 24 hours, in a wind of a velocity of from 7
to 8 meters per second. The second raises about 150,000 liters of
water to the Villejuif reservoir, at a height of 10 meters, every 24
hours, in a wind of from 5 to 6 meters. The third supplies the
laboratory of the Montsouris observatory.
The first is not directible, the second may be directed by hand, and
the third is directed automatically. These three machines defied the
hurricane of the 26th of last January.--_La Nature._
* * * * *
RELVAS'S NEW LIFE-BOAT.
The Spanish and Portuguese papers have recently made known some
interesting experiments that have been made by Mr.
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