iv CONTENTS. 
NUMBER LXXIV.—FEBRUARY. 
Page 
Short Account of the Scientific Writings of Dr. Ingenhousz. By Thomas 
Thomson, M.D. F.RAS. .....-eeeeeeeeeer ener settee ener sees teeceees 81 
On the History of Anthrazothionic Acid. By Theodore von Grotthuss 
(concluded) .....eseecesececeeneeecceerenes seit s sidluls) cevajeiateletatalctspeteratare 89 
On the Sulphuretted Chyazic Acid of Porrett. By Mi) Viogeloen...ssser 101 
On the Discovery of Cadmium, and the Analysis of anew Mineral. By 
Prof. Stromeyer. .-.eeeeeeeeceeeeesee cece se ttereeseanees sieeereeees 108 
On the Measure of Temperatures, and on the Laws of the Communication 
of Heat. By MM. Dulong and Petit. ...-..sseeseeeeeeeeeeeeeeeeete 112 
Defence of Dr. Murray's new Theory of Acids. By Dr. Murray. ...... 125 
On Mineral Species, in Reply to Dr. Wollaston. By M. Beudant ...... 126 
Meteorological Journal made at Cork. By T. Holt, Esq. .....-.-.++--+ 130 
On the Formation of the Rainbow. By Dr. Watt. ...........ceeeeeees 131 
Critical and Analytical Account of the Memoirs of the Wernerian Natural 
History Society. Vol. II. Part II. For the Years 1814, 1815, 1816 
(concluded). 1... ccercccesseccvacsercarsescsraevvesccasencsstscacas 133 
Proceedings of the Royal Society, Nov. 30, and Jan. 14....... ieee 140 
Geological Society, Nov. 6, and Dec. 4......++.+:- 141 
Society for the Encouragement of Arts, Manufactures, 
and 'Gommerce.,...i0.0% b <i5;oi1s gone tsinisitin la oie ti deigetas 142 
Method of determining the Specific Gravity of the Gases. .......+...++. 143 
Sulphate of Strontian ........ceceeeeeeeeeeeeeeeceeseren eens vies tspelebieg 144. 
Grptereameall NOISES. ..c kis fades elclcc.s esis emeincke keine islets Siefken ibid, 
Scientific Expedition in America. ........ceecseeenscevcescecccesesecs ibid, 
Mineralogy in America ........seeeeeeeeeeeees cmuemy holed) shaw ae A 145 
PAERICA a piclciis’s 2 ei)> oe vies pic's i led viccesle cle sacwelte «bp tistesle « «assem ees . ibid. 
Temperature of Bombay, . 0.200 00ccceccnsccesapecesecesousecenevsionns ibid. 
Population of Bombay. ........sseseseccvcrevcecescevenccsccsescreres 146 
Gezangabeen, or Persian Manna... ......000+.0ceesseieesodpisueialee te aio 147 
On the Tree called Lignum Rhodium in Pococke’s Travels. By Sir James 
award Smith, M.D: Pres: -L.S... .<:52 ss osbpisiele svicisield> siinineee dele 148 
Power of the Sarracenia Adunca to entrap Insects. By Dr. J. M‘Bride. 149 
British Species of Roses ....2. 2... sesecesiecwccnnsseewsse bs scseensauey 150 
Effect of Common Salt on the Solubility of Nitre in Water............+. 151 
Gonstiinents Of Saltpetres so... 0 sencieaycces sce cep csr sissebiecae 152 
Morphia......ccrccrsscccescscesnscesssspennen ope erie poe ne slolohaie slaat +. 153 
On the Equivalent Number for Morphia ..........+0.-esepeeeeeeeeeees 155 
Col. Beaufoy’s Astronomical, Magnetical, and Meteorological Observa- 
tions, for December 
Mr. Howard’s Meteorological Journal, Dec. 21 to Jan. 18. ....+se0-00- 159 
; —_— 
NUMBER LXXV.—MARCH. 
On the Measure of Temperatures, and on the Laws of the Communica- 
tion of Heat. By MM. Dulong and Petit (continued) ......00eree0: 161 
