CONTENTS. vu 



J)efcription and Uje of a nezu Portable Injlrument for afcer- 

 taining the Comparative Strength of Gunpozuder. By 

 C. Regnier _ „ _ Pff^e 394 



Account of a Red Suhjlance obfervcd on the Surface of a 

 Fijb-Pond hi Noriuay. By f'rofe/for H. Strom 397 



Cbfervations on the Jingular Sagacitj> of the Rock or Ice Fox 



402 



jin Account of Mr. Brown's Travels through Egypt and 

 Syria, ^c. {continued.) _ _ _ 4.05 



On the Difappearance of Swallows in Autumn ; in a L,etter 

 from Mr. Peter Cole to Dr. Mitchill, dated New- 

 York, Sel'tember 2^, l^g^ - - 414 



^leteorological Objervations made at Padua in the Month of 

 June 1783, with a Differ tation on the extraordinary Fog 

 ivhich prevailed about that Time. By M. To a L DO 417 



Ohfervations on Pumice Sto7ic, and the Places where found. 

 By ProfoJforBF.CKMAJSiii - - 423 



Eighth Ccrnviunication from Dr. Thornton, Phyfician to 

 the General Difpenfary , ^c. relative to Pneumatic Medicine 



JTezif Publications - _ ^ _ 207 



Intelligence and Mifcellaneous Articles 103, 31 ij 329, 431 



