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. Carlos Relvas with
a new life-boat which parts the waves with great facility and exhibits
remarkable stability. This boat, which is shown in front view in one
of the corners of our engraving, is T-shaped, and consists of a very
thin keel connected with the side-timbers by iron rods. Cushions of