the moon, in the same way as by another body placed in that centre, it will assume an oblate spheroidal form a b c; so that the waters at c will rise towards the moon, and the waters at a will be left behind, or will be less deflected than the other parts of the earth, by the lunar attraction, from that rectilineal direction in which all revolving bodies, if influenced only by a projectile force, would naturally move. formulæ for, app. 445, 447 Altitude of the sun, to find it by trigonometry, 54 Amontons on friction, app. 335 Analemmatic dial, app. 488 Anemometer, Leslie's, app. 278 Archimedes's screw engine, 113 mode of its operation, note, 114 Azimuth of the sun, to find it by trigonometry, 54, 59 B Besant's undershot wheel, app. Balance, improvement upon it, app. Barker's water mill, without wheel or trundle, various improvements upon it, app. rules for constructing it, app. Bevelled wheels, on the formation of their teeth, app. 230 385 97 205 208 203 Capstane, description of a simple and powerful one, app. Carriage wheels, app. conical rims disadvantageous in, app. 486 487 381 295 309 Carriage wheels, inclination of spokes disadvantage- ous, app: Cassegrainian telescope, app. table for, app. Page 302 474 475 Centre of gravity, mechanical method of finding it, app. 387 Coulomb on wind mills, app. on friction, app. Course of discharge, app. of impulsion, app. Crane, description of a new and safe one, invented by the author, Crown wheels, app. Cylindrical sun-dial for shewing the time of the day, method of using it, D Declining dials, Dial, horizontal, vertical, inclining, Lambert's, description of, app. to make three on three different planes with one ib. ib. by a terrestrial globe, and the shadows Dialing-lines, how constructed, Finder, a new one for Newtonian telescopes, app. Float-boards, number of, app. size of, app. position of, app. Flour mills, improvement upon, app. Fluid microscopes, app. Grey's, app 478 147 ib. 153 203 483 ib. single, invented by the editor, app. 484 Fluid object glass, Dr. Blair's, app. Fly wheels on the nature and operation of, app. - how they become accumulators of power, app. Friction, how to find the momentum of, in wind mills, 485 443 353 ib. 357 |