CONTENTS. 

 XVIIT. 0/? the ^Slod'ifications of Clouds, and on the Prin- 

 ciples of tlieir Production, Suspension, and Destruction ; 

 being the Substance of an Essay read before the Ashesian So- 

 ciety in the Session 1S02-3. By Lure Howard, Esq. 97 



XIX. Researches respecting the Organization of Leaves. 

 By A. J URINE, Member of tlie Society of Physics and 

 Kataral History of Geneva 107 



XX. Communication from Dr. Thoknton relative to the 

 Pneumatic Practice 121 



XXI. An Essay on the Fecula of Green Plants. By Pro- 

 fessor Proitst 122 



XXJI. yl Survey and Report of the Coasts and Central 

 Highlands of Scotland ; made by the Command of the 

 Right Honourable the Lords Commissioners of His Ma- 

 jesty's Treasury in the Autumn of 1802. ^//Thomas 

 Telford, Civil Engineer, Edinburgh, F. R. S 129 



XXIII. Anatomical Observations on the Crocodile of the 

 Nile. By E. Geoffrov 136 



XXIV. Observations and Experiments on the Light emitted 

 ly rotten If hod, in the dijferent Kinds of Gas, and in 

 Fluids. By C. W. Bockman, of Carlsruhe 146 



XXV. Conjectural Observations on the Mammoth. By 

 G. J. Wright, JE-'^^, 154 



XXVI. Catalogue nf Animals belonging to the Class Vermes, 

 found on the Coasts of Scotland, By Robert Jameson, 



F. R. S. F.A. S. Edinb. F.L. S. Lond. Honorary Mem- 

 ber of the Royal Irish Academy, &c. I6I 



XXVII. Letter j'rom M. Humboldt to C.Delambres, one 

 of the perpetual Secretaries of the National Listitute 1 63 



XXVIII. Account of the Marine Spencer for the Preservation 

 (f Lives in Cases oj Shipwreck or other Accidents at Sea. By 

 KxiGHT Spencer. J^'.^. of Bread-street, Chcapside 172 



XXIX. On the Electric Fluid 1 73 



XXX. Proceedings of Learned Societies 175 



XXXI. Intelligence and Miscellaneous Articles 184 



XXX H. Materials towards a more intimate Knowledge of 



Native Molybdena, containing a very advantageous Me- 

 thod of extracting Molyhdic^ Acid front that ^Sulphurei. 

 By C. F. BucHOLz 193 



XXXIII. Of the general Relation between the Specif c Gra- 

 vities and the Strengths and Values cfSpiritnousUujvors, and 

 the Circumstances by which the former are injhicnccd 205 



XXXIV. Of the Variations of the Tcmpexalnre of the 

 Summer and IVinter Sec(sons that take place in different 

 Years. By Richard Kirwan,, Esq. LL.D. F. R. S. 

 and P.Rfl.A 212 



XXXV. Account and Description of a Stone which fell 

 from the Chads in the Coinrnune of Sales near Ville-. 



pranclWi 



