INDEX. 32§ 



the fundamental and effential parts of an animal bod^ may- 

 be difcovered, 304. The double parts of the body produced 

 on each fide of the fingle parts by a fpecies of vegetation, 

 305. The fpinal marrow and vertebrae appear to be the real 

 axis of ail the double parts of the body, and the fource from 

 whence tliey proceed, ib. Proofs that the double parts pro- 

 ceed from tile fingle ones, 306. An attempt to explain the 

 manner in which the foetus is expanded, 309. Size of the 

 foetus at different periods of pregnancy, 314. — 318. Why 

 labour pains at laft come on, 319. The moll natural birtii 

 is when the foetus efcapes without burlling the mmibr-.aies, 

 321. Explanation of the ules of the umbilical chord, mem- 

 branes, Sic to the foetus, 322. Of the exiftence of the a/i7«- 

 tois in the human fpecies, 324. Whether the child may re- 

 fpire before its birth, 325. Of the circulation of the blond 

 before birth ; 326. Of the nourilhment of the foetus, 328. 

 The imagination of the mother cannot affeiS the foetus, 332. 

 Of the times of geftation, 334. Various opinions concern- 

 ing the caufes of delivery, 336. The author's reafons for 

 fuppoiing that it is occafioned by the menltrual blood, 339. 

 Why delivery is always followed by an haemorrhage in the 

 human fpecies, 344. No haemorrhage attends the delivery 

 of cows, (Keep, and other animals, 344. 

 Fofla, vii. 219. n. 



Foffane defcribed, vii. 219. Why called the genet of Madagaf- 

 car, ib. The genitals of the male have an odour of mufk, ib. 

 Is very difficult to tame, 220. Is the lame with the animal 

 called Berb in Guiney, ib. 

 Foflll IhcUs ; diflertation upon them, i. 188. Prodigious quan- 

 tities of them found in fome places, ib. An ignorant porter 

 in the 16th century, tirll alfcrted that they were really ftells, 

 in oppofition to the learned, 189. An allonilhing mafs of 

 fnells dtfcoveied by Reaumur, 190. Mr Reaumur's obferva- 

 tions concerning them, 191. 192. Tne above mentioned mafs 

 could not be the eJfed oJ the deluge, 193. How fuch pro- 

 digious quantities might be ccllefted, 194. Shells are the me- 

 dium employed by Nature m the formation of moil kinds of 

 ftones, 1 9 J. Are never found in common rocks, granite, or 

 free-ftones, 199. Are found on the tops of the higheft moun- 

 tains, 200. Strange opl.ioiu oi Leibiaitz and an Italian au- 

 thor concerning tjiem, 203. Are to be met with in almoft 



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