CONTENTS. Vv 
Page 
Necessity of Food containing Azote for the Nourishment of Animals.... 246 
Temperature of the Sea ......seeeeeeeeeeeee seen enerensneen eer ne eens 247 
Sulphate of Barytes in Surrey ....++-+eeseseeeeeeeeeeesereeeeseeeneees ibid. 
Celestine from Dornburg, near Jena..........eeeeeeeeeeeee arse ee ters 248 
On Vulpinite ...... 22. cee see eee np er tence eeteeeeeeerecenensenees ibid. 
Discovery of the Existence of Cobalt i in Meteoric Iron ..........+.+-5+ 249 
Death of Klaproth .......-.+. felch NNN, 25 ola b)$ ARS Sis ne «orn aise eeeed ibid. 
Bic Tres was oj ces aee sacs nose skcd eas bansngete aheepincck soe seeedee ibid. 
Query respecting Carmine .........+++seseee Beis ere ACOH TABBeB & 250 
Aurora Borealis at Sunderland ............ssecceceneeccecrcscseeencees ibid. 
Formulas for estimating the Height of Mountains...........+-+++++ee8- 251 
Improvement suggested in the new Blow-pipe of Mr. Brooke .......... 252 
PPPOE os 522 ccc se cece a ccles ob me celiac cic sesccbsr ee ceccaeeriavee te ol» 253 
Piriathter ee 8 ee ae se pclew ed cece enpasicngescrveneenieces ibid. 
R. M. A.’s Reply to the Queries of Civis ..........+-0++ waje(cnipieiseiislers)-§ ibid. 
Notices of Lectures ......+-0+++0000 BOD nae cee Keacdamirramtnmeiae = rite sis 254 
Dr. Thomson’s System of Chemistry ..........0eeseeee seen ceeeee ee enes ibid. 
Meteorological Table and Observations, Jan. 10 to Feb. 7...+.++-.-.055 255 
ie 
NUMBER LII—APRIL. 
Biographical Account of Dr. Richard Watson. By Dr. Thomson...... 257 
On the Poison Tree of Java. By Dr. Horsfield, concluded ............ 265 
Experiments on the Strength of different Kinds of Wood for ascertaining 
the Law of the Resistance: also Observations on the Practice of staying 
Masts, and additional Remarks communicated by Mr. G. Smart on the 
fame Subjects. | By-Col.Bedufoy*. 00s. seceieiQuiiss viatevie ss dee ee 274 
On the Power. of Spiders to. convey. their Threads from one Point to 
another, and of flying through the Air. By Carolan................ 306 
On the Cells and Combs of Bees and Wasps, By Mr. Barchard........ 310 
Description of a new portable Barometer, and anew Hygrometer. By 
Maniel Wilson, Hsqe ae csbs conv acoranrs caetasiore des du stsasescseddees 318 
Proceedings of the Royal Society, Feb. 27, March 6, 13, and 20...... 828 
Linnzwan Society, March 4 and 18............2.5. 324 
PUtices of Lectures s.s0ccrsegiesescadet staple etd seca sta des tcdue’ 326 
New Method of taking the Specific Gravity of Gases ..........4-++00+: ibid. 
Further Improvement in Brooke's Blow-pipe. By Dr. Clarke .......... ibid. 
Canvas Tubes for conveying Water. ..,....cecesceeecscsevencceeeeerees 327 
On Hannibal's softening the Rocks of the Alps by Vinegar. By Col. 
BealOy ..... ngs sdaeeeltad ooh hie via ed ew Wald Ue cask otiet So CaS B cic 328 
Catmmical. Nomencianye. -dacccsviranved docctweades dustgbscticdccessede 329 
On the Mode of detecting Lime in Sugar of Lead .........+-+0eeeeees 330 
Query respecting Stains of the weaker Acids ..........00c0eseeeeeeaees 331 
rr Artificial Camphor ...... cee eeseeeceeccreceereeseeees ibid. 
Chemical Composition of Minerals.......:ccecseeeseeeteetteteneeeeene ibid: 
