24 



tlonal value upon it, as it was a favourite of his late uncle 

 Mr. Forster, and was given him by the late Right Hon. 

 Charles Grevillej in whose collection is the only one known 

 besides. It was an unfortunate jealousy in Rome de Lisle 

 that hindered its being published long since in his work as 

 an extraordinary production. I hope such pitiful jealousy 

 will no longer be an obstacle to the elucidation of science. 



