CONTENTS. 

 NATURAL HISTORY. 



On the Nature of tke Diamond . . , . . 389 



On the Action of Nitr£. upon Gold and Platina . . .391 



Ohscrvai'ions and Experiments viade t& determine the poisonous Qualities 



of A%ots . . . .... 393 



rruceedings of the African Association » .1 399 



USEFUL PROJECTS. 



List of Patents granted during the. Year 1797> for various Inventions 406 

 RecApt for preventing Smut-Balls or Bunts amongst meat . 409 



imt Report of the Cornmittee on ff'ostt Landsy tSc. . . 410 



ANTIQUITIES. 



Order of the House of Commons, made in the Year l6il,/or rating every 

 Man according to his Estate for the. King's Use . . 418 



Account of London- Bridge .... Hid. 



Account of the Pyramid of Caius Cestius at Rome . .421 



Moman Method of computing Time . . . ibi4. 



MISCELLANEOUS ESSAYS. 



L-ssay on the Means of confning Heat, and directing its Operation^' 423 

 On the Danger of7ising I'css^ls of Lead, Copp,^, or Brass, in Dairies 429 

 On the ancient and modern Navigation of India . , 431 



Disquisition on the Phrase, " The Enlightened Public." . . 435 



Count Alferi's Dedication of his Tragedy of Junius Brutus to General 

 ira-shington ...... 43*7 



The like ofAgis to Charles' the First, King of England . . ibK^. 



Modern Platonisni . . . . . 438 



Proceedings of the lliemic, or irestphafian Court - - .440 



Soup fof the- Poor . , , , . 44I 



P <5^ E T R Y. 



