166 NATURAL HISTORY. 



Pag. 



Of Teeth, and Hard Substances in the Bodies of Living 



Creatures . . . . . . .31 



Of the Generation and Bearing of Living Creatures in the 



Womb . . . . . . .36 



Of Species Visible . . . . . .38 



Of Impulsion and Percussion . . . .40 



Of Titillation . . . . . .41 



Of Scarcity of Rain in Egypt . . . .42 



Of Clarification . . . . . .42 



Of Plants without Leaves . . . . .43 



Of the Materials of Glass . . . . .43 



Of Prohibition of Putrefaction, and the long Conservation 



of Bodies .... 44 



Of Abundance of Nitre in certain Sea-shores . . 46 



Of Bodies borne up by Water . .46 



Of Fuel consuming little or nothing . . .47 

 Of Cheap Fuel ...... 47 



Of Gathering of Wind for Freshness . . .48 



Of Trials of Airs .... 48 



Of Increasing Milk in Milch Beasts . . . .49 



Of Sand of the Nature of Glass . . . .49 



Of the Growth of Coral . . . . .50 



Of the Gathering of Manna . . . . .50 



Of the Correcting of Wines . . . . . 51 



Of Bitumen, one of the Materials of Wild-fire . . 51 



Of Plaster growing as hard as Marble . . .52 



Of the Cure of some Ulcers and Hurts . . .52 

 Of the Healthfulness or Unhealthfulness of the Southern 



Wind . . .- . .52 



Of Wounds Made with Brass, and with Iron . . 53 



Of Mortification by Cold . . . . .53 



Of Weight ....... 54 



Of Super-natation of Bodies . . . .54 



Of the Flying of Unequal Bodies in the Air . . 55 



Of Water, that it may be the Medium of Sounds . . 56 



Of the Flight of the Spirits upon Odious Objects . . 56 



Of the Super-reflexion of Echoes . . . .57 



Of the Force of Imagination imitating that of the Sense . 57 



