which take place in diffrent Climates. a3 
woods are cut down and its plains cultivated, the feverity of 
the winter cold will not only decreafe, but the fiifling uns 
thealthful heat of the fummer will be moderated. The quan- 
tity of the’{now, ice, and moifture is already evidently lef- 
fened ; and many plants, which could not be cultivated there 
formerly, now thrive and fuceced. 
I now come to the laft and principal caufe of thefe changes, 
which aéts in a general and uniform manner in preducing 
thefe effects, as all the others are merely accidental, and de- 
end on human induftry, I here mala to fay, that the 
principle of heat, increafed continually in the courfe of time, 
fo as to overcome the oppofite principles of motiture and cold, 
rénders, by thefe means, the earth drier and fuller of ftones, - 
and confequently increafes the fum of the degree of heat. 
Without this principle, in my opinion, we can never find 
fufficient ‘grounds for the wonderful changes which have 
taken nee in the nature of the foil of all ee Jands which 
border on the Mediterranean fea, which formed the ancient 
empire of Rome from Syria to India, and which at. prefent 
have all become uncommonly fruitful, dry and ftony, as I 
have already remarked. The mere neglect of agriculture 
could never have produced thefe effets, and muft have been 
attended rather with-effects of a contrary nature *, 
‘VI. Agenda, 
* The author here fubjoins the different paffages of ancient authors al- 
luded to in the courfe of this paper; but as thefe would occupy too much 
room, we muft content ourfelves with giving only the references, whict 
will no doubt be acceptable to our learned.readers, who may be defirous 
of profecuting this fubject farther :—Herodotus (469 years before the birth 
of Chrift), Lib. LV. cap. 28, 29; M. Terentius Varro (72 years before 
9. C.), De re ruftica, Lib. I, cap.73 C. Jul. Cafar (52 years before 
§.C.), De bello Gallico, Lib. 1V. cap. 153 Virgil (50 years before J. C.), 
Georgie. Lib. IIT. v. 349-383; Georgic. LV. v. 125,135; Diodorus 
Siculus, (45 years before J,.C-), Biblioth. Hitt. Lib. V. cap..25; Ovid 
(to-years before J. C.), Trift. Lib. 111. Eleg. 1V.v. 48, 49. 513 Eleg. X; 
| Strabo (26 years after J. C.), Geograph, edir. Bafil, 1539, Lib. 1!. 
p. 67, 68. 107. 119, Lib. VIL. p. 297; Pomponius Mela (40 years after 
§.C.), De fitu orbis, Lib. Il. cap. 1. De S ythia Evropeea; cap. 2, De 
Dheacia; Lib. U1. cap ILL. De Germania; Columella (43 years after 
J.C), De re ruttica, edit. Sephani 1543, in prafen. 7,8. Lib. J. cap. a. 
p. tt, 125 L. Ann, Sencca (55 years after J. C.), De providentia, cap. 4. 
edit. Ludy. Bat, Tom. i. p. 7113 Petronius Arbiter (60 years after J.C.) 
Satya 
