ADVERTISEMENT. X? 



'' attributing the caufe of the tides to the melting 



*' of the polar ices, &:c In order to weaken 



** the force of my refults, he exhibits them without 

 •* the proofs. He carefully keeps out of fight my 

 " demonftration of the faft, fo fimple and fo evi- 

 *' dent, by which 1 have made it to appear, that 

 *' when the degrees of an arch of a circle lengthen, 

 ** the arch of the circle itfelf likewife lengthens, 

 ** and does not become flat. This is demonftrable 

 " from the poles of an egg, as well as from thofe 

 *' of the Globe. He has not told, that the ices of 

 " each pole, having a circumference of from five 

 *' to fix thoufand leagues, in their winter, and only 

 ** from two to three thoufand in their fummer, I 

 ** had good ground for concluding, from their al- 

 " ternate fufions, all the movements of the Seas. 

 " He has not faid a fingle word of the multitude 

 *' of proofs geometrical, nautical, geographical, 

 ** botanical, and even academical, by which I have 

 *^ fupported thefe new and important truths. I 

 *' leave it to my Readers to judge how far they are 

 '' folid. 



" As it is evident that this anonymous Writer 

 " has obferved Nature only in Syftematic books ; 

 " th^t he oppofes names merely, to fafts ; and au- 

 " thorities, to reafons ; that he there confide rs as 

 " decidedly certain, what 1 have completely re- 

 ** futed ; that he makes me to fay in his critique 



" what 



