The vito-magnetic fluid is capable of becoming amassed, condensed and rarefied. In the tornado that happened at Natchez, in 1840, the houses _exploded_ whenever the doors and windows were shut, the roofs shooting up into the air, and the walls even of the strongest buildings bursting outward with great force. On the 18th of June, 1839, a whirlwind fell upon the village of Chatenay, near Paris. In the room of a house over which it passed, several articles of needle-work were lying upon a table. The next day some of them were found in a field at a distance from the house, together with a pillow-case taken from another room. They must have been carried up the chimney by the rush of air outwards, as every other means of exit was closed. It is a fact well-known to miners that during and before violent tempests, strong ascending currents are observed. [Illustration: Pl. IV. MANUFACTURED WIND.] If a metallic rod terminating in a point be attached to the conductor of an electrical machine, electricity escapes in large quantities from the point. A continuous current is thus kept up and the flame of a taper, if placed in front of the current, is blown in a horizontal direction. Wind is thus _manufactured_ on a small scale. Pl. IV. At a recent meeting of a Meteorological Society in England, a paper was read by the REV. JOSEPH CROMPTON, M.A., F.M.S. "The author, when walking close to the Cathedral of Norwich, was struck with the unusual fluttering of the flags on the top of the spire, which was 300 feet high. They were streaming with a strained, quivering motion perpendicularly upwards. A heavy cloud was passing overhead at the moment and as it passed, the flags followed the cloud and then gradually dropped into comparative quietness. The same phenomenon was noticed several times. As the cloud approached, the upper banner began to feel its influence and streamed towards it, _against the direction of the wind_, which still blew as before, steadily on all below. As the cloud came nearer, the vehement quivering and streaming motion of the flags increased; they began to take an upward perpendicular direction into the cloud and seemed almost tearing themselves from the staves to which they were fastened. Again as the cloud passed, they followed it as they had previously streamed to meet its approach, and then dropped away as before, one or two actually folding over their staves. All the other flags at the lower elevation did not show the least symptom of disturbance." In this phenomenon we observe the operation of two of the wind-producing causes just mentioned, viz.:--a wind arising from purely local causes, and of limited extent, occurring within the boundaries of a wind produced by the action of more general, and widespread causes--_A wind within a wind._ The above instances plainly carry a suggestion of magnetic origin and power. _Winds may not arise from Presumed Causes._