540 INDEX. 



Plants, experiments promiscuous touching, 284. 



and living creatures, differences and affinities between, 282. 

 without leaves, 405. 

 Plaster, as hard as marble, 414. 

 Plumage and pilosity, 858. 

 Pneumaticals, two kinds, 452. 



Powder which will discharge a piece without noise, 78. 

 Powders and liquors, incorporation of, 147. 

 Predisposition, cure of diseases contrary to, 41. 

 Preparations before purging, 42. 

 Purging medicines, operations of, 24. 



medicines, 10. 

 Putrefaction, causes of, 163. 



means to induce and accelerate, 164. 

 of moulds, 166. 



various means of checking and preventing, 167. 

 causes of, 446. 



Pythagoras, philosophy of, 487. 

 Quarries and cements, 408. 

 Rainbow, sweetness of odour from the, 437. 

 Refraction, experiments on, 402. 

 Rice, 31. 

 Rhubarb, infusions of, 10. 



operations of, 28. 

 Roman ointment, 88. 



Rose-leaves, preserving of in colour and smell, 181. 

 Salamander, experiment touching the, 466. 

 Salt-water, draining of, 2. 



dulcoration of, 476. 477. 

 Saucers, experiments with two, 98. 

 Scarlet-dye, 479. 

 Sea, experiment on the colour of, 473. 



different darkness of, 354. 

 Sea-fish, put in fresh-water, 371. 

 Seas, rolling and breaking of the, 476. 

 Seasons, pestilential, 189, 358. 

 Senses, pleasures and displeasures of the, 368. 

 Shadows, experiment touching, 475. 

 Shell-fish, 474. 

 Sides, right and left, 474. 

 Sickness, winter and summer, 189. 

 Skin, casting of the, 886. 

 Sleep, experiment touching, 398. 

 35. 



after dinner, 86. 

 in the morning, 86. 

 Smells, experiments touching, 192. 

 corporeal substance of, 439. 

 Sneezing, experiment touching, 357. 

 Sounds various, experiments on, 85 . 



various experiments touching the magnitude and exility of, 87, 



better heard at evening or at night, 88. 



production, conservation, and dilatation of, 80. 



experiments touching, 74. 



reflexions of, 88. 



maj oration of, 91. 



experiments touching the loudness or softness of, 95. 



in consort touching the communication of, 96. 



