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CONTENTS 



QUARTERLY JOURNAL, 



No. XXXIX. ^~SSMLL 



ART. PAGE. 



I. Some Account of the Prang-os Hay Plant of Northern India ; pre- 

 pared by permission of the Honourable Court of Directors of the 

 East India Company. By Mr. John Lindley, F.L.S., &c.. 

 Assistant Secretary at the Garden of the Horticultural Society 

 of London .1 



It. Some Observations on the Physiolog-y of Speech, read to a Lite- 

 rary Society, at Nottingham, on January the 3rd, 1825: by 

 Maiishall Hall, M.D., F.R.S., &c. &c S 



III. On some Cases of the' Formation of Ammonia, and on the 

 Means of Testing the Presence of Minute Portions of Nitro- 

 g-en in certain states. By M. Faraday, F.R.S., Corr. Member 

 Royal Acad. Paris, &c. &c. 16 



IV. Description of the Coal recently discovered on the Estates of the 

 Count de Regla, in the Intendancy and Kingdom of Mexico. 



By Th, Stewart Trail, M.D., F.R.S.E., &r. . .26 



V. On the Origin, Materials, Composition, and Analogies of Rocks. 



By John Mac Culloch, M.D., F.R S.E. . , . 28 



VJ. On Light and Heat from Terrestrial Sources. By Baden 

 Powell, M.A., F.R.S. . ... . . . % 



VII. .On Anhydrous Sulphuric Acid. By Andrew \3\<v.y M.D., 



F*,R.s. &c m 



VIII. Outlines of Geology, being the Substance of a Cmtrseof Lec- 

 tures on that Subject, delivered in the Amphitheatre of the Royal 

 Institution of Great Britain, by William Thomas Brandr, 

 F.R.S., Professor of Chemistry in the Royal Institution, &c. 63 



