32S INDEX. 



uncertain whether it is the it^ii of the Greeks, 255.; pretty 

 ftrong proof againll their identity, ii. 



Flal-mus, vii. 316. n. 



Fial-rache, vii. 25S n. 



Field-moufe, iv. 42. 85. 293. 



Long- tailed dtforibcJ, iv. 23y. Very generally and copi- 

 oufly dlfFuii;d, efpeciiilly through elevated countries, if. A 

 fmgle at^imal \vill fomttimes atnafb a whole buihel of acorna, 

 nuts, &c. aSy. Is an exceedingly prolific animal, 289. They 

 devour one another, iL 



■ Short- tailed field moufe more generally diffufed than the 



former, iv. 293. ; does gre^t damage by cutting the ftalks ot 

 corn, ih. ; refembles the water-rat in its internal ftrudure 

 more than any other animal, 294. 



FilTital, vi. 206. n. 



Fiffures of the earth neceffarily afllime a perpendicular direflion, 

 and why, i. 42. Their fides correff ond as exadly as thofe of 

 a fplit piece of wood, 43. 270.; vary greatly in their extent, 

 /i. 470. Caufc of the large fifl'ures, Ja. Ditiertation on per- 

 pendicular fiiTures, 442.; their origin hitherto unexplained, 

 458.; are often filled with concretions, ibmctinies regular and 

 tranfparent, and fometlmes earthy and opaque, 463.; are 

 found in flint rocks as w-ell as in ftoue, 469. 



foetus; difcourfe on its formation, ii. 271. Is either male or 

 female, according as the organic particles prevail in the mali; 

 or female femen, 274. Why a toetus cannot be produced in 

 the body of the male, 278. Placenta and membranes pi o- 

 duced at the fame time with the foetus, 279. V. hy two foe- 

 tufes are not produced inilead of one foetus with a placenta, 

 Sec. 80. Sexual parts of the male foetus derived foiely from 

 the father, and the rell of the body from the mother, and 

 vies vsrfa, 283. The foetus is formed by a mixture of the or- 

 ganic particles of both i'.'xes, 286. Attempt to explain ils 

 lormation, 2R7. Tl^c whofc foetus formed at the fame time, 

 289. The v.-hole peihaps firmed in a moment, 294. How 

 foetufes may b; formed in the vagina, //'. Inilances of their 

 beiag found in the ovaria. Fallopian tubes, &c. 295.; of 

 their being formed in die tefticlcs ai men, 296.; how this 

 may happen, and how virgins may produce moles, 297. 298. 

 Of the expanfion, growth, and delivery of the foetus, 302. 

 X'.vo kinds ()f growth d!0.ingiiifliii,ble in the foetus, ih. How 



thei 



