CONTENTS. 



On some newlj/ discovered rcmarlahle Prapeities of the Prot- 

 oxide, Oxidized Sidphuret, a7id Metallic Fcxder of Platimmi. 

 By Professor Dcebereiner 289 



On the Pm-allax of « Lyra;. By John Pond, Esq. Astrono- 

 mer Royal, F.R.S. 292 



On a ne'iV Uteam-Evgine Governor. By Mr. Preuss 297 



A7i Account of some Electro-magnetic Combinations, for exhi- 

 biting Thermo-electric Phcenomena, invented by Mr. James 

 Marsh of JVookvich; ivith Exjjeri7ne7its o?i the same. By 

 Peter Barlow, Esq. F.R.S. 321 



On the Caloric of Gases a7id Vapours, by M. Poisson: 'with Ob- 

 se7-vatio7is by John Herapath, Esq 328 



On the Qnadratia-e of the Circle. By Mr. J. Snart . 338 



A7i Exa/ninatio7i of cerfai7i Mine7-als. By Augustus Arf- 

 WEDSON 355 



On the Origin and Productio7i of Matter, and 07i its alleged 

 I7ifi7iite Divisibility 360 



Om the Petrifactio7is of Osteiixeddigen, near Magdebu7-g. By 

 P7ofessor Germar 367 



Rema7ks oii some of' the A7ue7-ica7i A7ii/nals of the Gc7ms Felis, 

 pa7-tic7da7-lij 07i the Jagua/; Felis Onca Li7i7i. By 1\ S. 

 Traill, M.D. F.R.S.E. <^x 372 



On the AdJ7(st7)ie7it of the Line of Collimatio7i of the Tra7isit 

 l7ist7'U)7ie7it 377 



Plcmtce rarce Sncade7it£e ; a Desa-iptio7i of some rare Succ7de7it 

 Pla7its, by A. H. PIaworth, Esq. F. L. S. c^r. . . , 380 



0?^ the Cultivation of the E7iglish Cra7ibei'7y (Oxj'coccus pa- 

 lustris) 171 d7y Beds. By Mr. Thomas Milne . . 382 



Tlte Specific Characters of several imdescribed Shells. Btj 

 W. SwAiNsoN, Esq. F.R. 8f L.S. S>r 40*1 



On the Ma7iagement of Ccadifoxver Plants, to secitre good Pro- 

 duce duri7ig the fVi7iter. By Mr. Geo. Cockburn 404 



Descriptio7i of a Method of protecting Caidflower and, other 

 tender Plants dining Winter. By Mr. J. Dkummond 405 



Method of defe7idi7ig Ships a7id Fortifications agai7ist Ca7tno7i 

 Balls. By Lewis Gompertz, Esq 407 



071 Fhiid Chlo7i7ie. By Mr. Faraday 413 



071 the Co7ide7isation of several Gases iiito Liquids. By Mr. 

 Faraday 414 



A71 Exami7iatio7i of the green Garnet ofSala. By B. G. Bred- 

 BEUG 423 



Olse7-vatio7is 071 Suspe7isio7i Chaiii Bridges; "witJi a7i i7iiproved 

 Method of fnnning the S7ipp07ting Chains or Rods: accom- 

 panied -dith a D/cfwing. By Mr. J. Seaward . . 425 



An Account of a vexv Ge7ius o/'Narcissftu, allied to the Ge7ms 

 Ajax of Salisbury. By A. 1 1. 1 f awoutii, Esq. F.L.S. S)C. 440 



