180 Review. 



15. On two species of Sphex, inhabiting Virginia 

 and Pennsylvania, and probably extending through 

 the United- States. By B. Henry Latrobe. 



16. Memorandum concerning a new vegetable 

 Muscipula. By Dr. Barton. 



17. On the Process of claying Sugar. By Jona- 

 than Williams, Esq. 



18. An Account of some new-discovered Islands 

 or Shoals, in the Indian Seas. By Mr. Thomas, 

 an officer on board the American ship Ganges. 



19. First Report of B. Henry Latrobe, to the Ame- 

 rican Philosophical Society, held at Philadelphia; in 

 answer to the enquiry of the Society of Rotterdam, 

 " Whether any, and what, improvements have been 

 made in the construction of Steam-Engines, in Ame- 

 rica ?" 



20. Account of the fusion of Strontites, and volati- 

 lization of Platinum, and also of a new arrangement 

 of apparatus. Communicated by Robert Hare, junr., 

 member of the Society. 



21. An account of a Cock, with two perforations, 

 contrived to obviate the necessity of a a vent-peg, in 

 tapping air-tight casks. By Robert Hare, junr. 



22. Some account of a New Species of North- Ame- 

 rican Lizard. By Dr. Barton. 



