INDEX. 



697 



Descent of water, 11. 222. 

 Descent on a given surface, 



II. 33. 

 Descent on elastic surfaces, 



II. 133. 

 Descent to a centre, II. 29. 

 Description dcs couraus 



magnetiques, II. 436. 

 Description d'un tliermome- 



trc, II. 386. 

 Description of curves, II. 



120. 

 Description of equal areas 



I. PI. 1, II. 31. 

 Dcsfontaines, I. 727. 

 Dcslandes,II. 370. 

 Despiles, II. 142, 217. 

 Deto, II. 154. 

 DetrusioQ, or distrusion, I. 



135. 

 Deutscher Mercur. II. 474. 

 Deviation of ligfo, II. 71. 

 Dew, II. 301, 465, 474. 

 De Witt, II. 204. 

 Diagoiud.I. PI. 1,11. 13. 

 Diagonal diviisions, II. 155. 

 Diagonal scale, I. PI. 7. 

 Dialling, I. 538, PI. 35, II. 



348. 

 Dial plate, II. 194. 

 Dials, II. 318, 375. 

 Diameter, II. 9. 

 Diameters of the planets, 



II. 372. 



Diamond, L 145, 412, II. 



509. 

 Diamonds, ^I. 217, 293. 

 Diapason pipes, 1. 402, PI. 



26. 

 Diaplianometer, II. 282, 



•474. 

 Diaphragms of a vessel, II. 

 ■ -223. 



Diusporomctcr, II. 232. : 

 Dibbling, II. 218. 

 Dickson, II. 519. 

 DIcqucrowc, II. 645. 



, VOL. II. 



Diclionnaire des arts et me- 

 tiers, II. 141. 

 Dictionnaire des origines 



des inventions, II. 217. 

 Dictionnaire des sciences 



naturcUes, II. 129. 

 Dictionnaire d'histoire na- 



turelle, II. 503. 

 Diek, II. 284. 

 Dictcrich,ll. 325. 

 Differential method, II. 



119. 

 Differential thermometer,!. 



649, Pi. 39, H. 389. 

 Diffraction, I. 437, II. 310, 



316, 621,642. 

 Digester, 11.410,412. 

 Digges, I. 474, II. 144. 

 Digging, 11.211. 

 Digging in water, II. 232. 

 Digits, I. 530. 

 Dijon, II. 110. 

 D'Iuarre,lI. 416. 

 Dikes, I. 312, 11. 118, 233. 

 Dilatation of air, II. 408. 

 Dilatations of pipes, 11.299. 

 Diminishing friction, II. 



200. 

 Diminution of columns, II. 



173. 

 Diminution of degrees, II. 



.S58. 

 Diminution of the sea, II. 



496. 

 Diminution of the sun, II. 



339. 

 Dinocrates, I. 239, 253. Fl. 



300. B. C. 

 Diogenes I.:iertiiip, II. 216. 

 Dionaca, I. 724. 

 Dionis du Sejour, II. 337, 



34 4,416. 

 Diophantus, I. 243, 253, IT. 



• 115. Fl. 156. 

 Dioptrical fonmdac, 11.287. 

 Dioptric glasses, H. 231. 

 Dioptrics, I. 414;, H.tC^2C0. 



4 X 



Dioscorides, 1. 746, T56.F1. 



23. 

 Dip, I. 692, PI. 41 . . 43, 

 II. 299, 301, 302,355, 



440, 443. 

 Diplantidian telescopes, II. 



351. 

 Dipping needle, I. 689, PI. 



41,11. 444. 

 Direction, II. 27. 

 Direction of balloons, II. 



256. 

 Direction of motion, I. 20. 



PI. 1. 

 Direction of sounds, II. 



575. 

 Direction of the electric 



current, I. 669. 

 Direct motions, I. 527. 

 Direct tide, I. 579. 

 Disappearance of heat, II. 



408. 

 Discharge of air, II. 531. 

 Discharge of electricity, I. 



666, II. 422. 

 Discharge of fluids, I. 279, 



II. 61,222. 

 Discharge of pipes, I. 293, 



PI. 20. II. 222, 223, 225. 

 Discharger, I. PI. 40. 

 Discharging electrometer, 

 « II. 434. 



Discords, I. 394,11. 571. 

 Discourse on local motion, 



II. 130. 

 Discs of planets, I. 527. 

 Diseases, I. 740. 

 Diseases of plants, I. 730. 

 Disengaging horses, II. 203. 

 Dished wheels, I. PI. 18. 

 Dispersion of light, I. 463. 



11.77,282,287,295,320, 



637. 

 Dispersion of the eye, II. 



312, 313, 5«4, 638. 

 Dispersive pouers, II. 298, 



J!*9.> 50S^ 679. 



Drsplacerhent of rtie eqtia> 



tor, II. 342. 

 Dissimilitude of meridians, 



II. 841. 

 Distance, II. 9. 

 Distance of objects, I. 45S. 

 Distance of the sun, de- 



fluced from the theory of 



gravity, II. 310. 

 Distances of the planets, I. 



506, PI. 32. II. 333, 372. 

 Distances of the Satellites, 



11.373. 

 Distances of the starsj II. 



329. 

 Distemper, I. 95. 

 Distilling, II. 396, 41S. 

 Distinctness of t^eiwopCI, 



II. 289.1 .1 , .:>iv.a[ 

 Distinguisher of electricity, 



II. 434. 

 Distorted iris, II.>B03'. • 

 Distribution of electricity, 



I. «61. r: \- ' 

 Distribution of magnetism, 



I. 668. 

 Distribution of pressure,!. 



44, 134. 

 Di:>tribution of water, II. 



235, 245. 

 Distribution of weight; H. 



211. 

 Disturbing force of the rofe, 



I. 520. 



Ditton, II. 119,219, 381.. 

 I^iurnal variation, II. 442, 



443. 

 Divergence of i streatn bf 



air, II. 534; 

 Divergence of light, t. 420. 

 Divergence of soimJ, 1. 37!i. 



II. 265, 338. 

 Divergence of unduUcioat, 



II. 619; 620. 

 Divergence of wavcBy I. JEt. 



,20.: 

 Divided eye glass. I. 4SS, 

 PI. 23, II. 290. 



