194 ANIMALCULA OF INFUSIONS. Iv 



TWO EPISTOLARY DISSERTATIONS ON INFUSION ANI* 

 MALCULA ADDRESSED TO THE AUTHOR BY THE 

 CELEBRATED M. BO;^NET OF GENEVA. 



ARGUMENT, 



MA^fY of the refults in thefe trafts had at dif-' 

 ferent times been communicated to M. Bonnet, 

 efpecially in two long letters of 20 December 

 1770, and 15 September 1771. The anfwer 

 to the latter will be found in the Tra£l on Seminal 

 Vermiculi, and that to the other is the firfl of the 

 following. As thefe two letters particularly com- 

 prife the refults on infufion atiimalcula, it has 

 been judged proper to fubjoin them to the tra6tJ 

 What the reader Has previoufly perufed will en- 

 able him to underftand them properly. 



According to M. Bonnet's defire, feme anno- 

 tations have been made by the author, where ha 

 felt liirhfelf neceffitated to be of a different opi- 

 nion. And he has been the more induced to it 

 as he knew M. Bonnet was fmcere. Thefe let- 

 ters, efpecially the fecond, would afford a ftriking 

 inftance of the facility with which- this great 

 philofopher abandons his opinions, when incon- 

 fiflent with fa£ls, or lefs probable than thofe of 

 another, if his other works did not already de- 

 monflrate it. 



LETTER. 



