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indices pointing to some natural cause, especially where these indices are collected from many and different parts, that must enable us in the establishment of a science that will as unerringly forewarn us of tempests and floods, of convulsions and earthquakes, as the hands of the dial plate now tell us when to expect the coming sunset, or the coming sunrise.

There are some minds so well trained in natural instinctive observation, as to be able to tell the time of day, without seeing a clock, with a precision as correct is did the Stratford swan the coming of the rainfall.

The new foundation that has been laid, and upon which our future science must [[strikethrough]] be [[/strikethrough]] I will not say use or fall, be built, I mean the correlation and conservation of physical forces, or what it seems to me still more comprehensive, the great law of motion, [[strikethrough]] or motion per se [[/strikethrough]] renders natural observation, the observation of instinct, of reason, of induction from nervous sensibility, the more important in the generalization of natural phenomena, [[strikethrough]] decrease [[/strikethrough]] inasmuch as the main cause is thus held in view by every one engaged in the investigation of meteorological phenomena.

A great heat wave always precedes a tornado. I sailed in one for a distance of a thousand miles before it developed itself in my immediate track into a discharge of electricity and deposition of rain, although at some distant lateral points thundergusts were manifested during its procedure. And here is presented a question for meteorological solutions. Does this heat wave derive its origin from the surface of the earth by irradiation of the sun's heat; or is it due to electrical disturbance, or electrical motion in the upper air?