The following observations of the direction and force of the wind, were made with an anemometer lately invented by Professor Whewell of Cambridge.

In this instrument the only part that is fixed is a japanned cylinder, on which the points of the compass are marked by black lines dividing it in its whole length into compartments, corresponding to the spaces intervening between any two double points. On this the other parts are supported by means of a strong rod which runs down the centre of the cylinder, and, terminating in a sharp point, turns easily round as the wind changes. A single broad vane, having the rod running down the centre of the cylinder for its axis, presents to the wind a fly resembling the sails of a wind-mill, and causes the moveable part of the instrument to revolve round the fixed cylinder as the wind changes; so that the aërial current, come from what quarter it may, blows against the circular disk of the fly, and turns it with a velocity proportional to the force of the wind at the time.