I N D E X.

tcllites, iii. 125 n. Of the Sun or Stars, what, in.257. Of a Place, what, iii. 281.

Logarithmic Curve, its Nature investigated, ii. 250 n.Lunar Eclipse , Theory of, explained, iii. 319, if sq.

M.

l\/TAchine, Effect of Friction on, i. 170. Compound^ what, i. 180. Greatest Perfection of, i. 184.Friction of, how diminished in, i. 182 n. 183 n.Maculce. See Spots.

Magic Lanthorn , what, iii. 78.

Magnetic Effluvia, Method of rendering them visible,si 44 n. Attraction, its Law not ascertained, i. 47 n.Magnet , several Properties of, i. 42, and i. 43 n. Asurprising Property of, ibid. & sq. Different Powersof, i. 47 n. if sq.

Magnetism , Instances of acquired by Iron Bars, si 48 n.Several Methods of communicating, ibid. if sq-Mr. Haas s Experiment for recovering the decayedVirtue of Loadstones, i. 50 n.

Magnets, how to make artificial, i. 75, if sq.Magnitude of Bodies, what, i. 6 n. • Centre of, what,i. 148.

Maps of the World, what, iii. 299. Principles Philo-sophical of, iii. 306 n.

Matter in all Bodies the fame, i. 4 n. Difference arisesfrom various Modifications, i. 3. Exemplified inWater, i. 5 n. Figurability a Property of, i. 8 n.Infinitely divisible in a mathematical Sense, i. 9.Mobility of, i. 10. Vis inertia of, what, i. 11.Attraction of, what, i. 12. Repulsion of the Particlesof, what, i. 13.

Maxima apd Minima , Examples of, si 228, n. and si230. Bees construct their Cells by, i. 234 n.Mechanical Powers, i. )6i. Why so called, ibid.Mechanics , fundamental Principle of, i. 162. Not un-derstood by those who imagine the Pofiibility of aperpetual Motion, i. 162. Demonstration of thefundamental Principle by Sir Isaac Newton, i. 167 n.Mechanism of the Parts of Clocks and Watches, sii 190