Miscellanea Curiosa.

the Sun sets not, the Heat is as the Circumference of a Circle into the Sine of the Altitude at 6. And consequently, that in the same Latitude these Aggregates of Warmth, are as the Sines of the Sun's Declinations; and in the same Declination of Sol, they are as the Sines of the Latitude, and generally they are as the Sines of the Latitude into the Sines of Declination. IV. That the Æquinoctial Days Heat is every where as the Co-sine of the Latitude. V. In all places where the Sun sets, the difference between the Summer and Winter Heats, when the Declinations are contrary, is equal to a Circle into the Sine of the Altitude at six in the Summer Parallel, and consequently those differences are as the Sines of Latitude into, or multiplied by the Sines of Declination. VI. From the Table I have added, it appears, that the Tropical Sun under the Æquinoctial, has, of all others, the least Force. Under the Pole it is