CONTENTS. 
On Vegetation in artificial Media. +6 es s+ ae 121 
‘On the Geology of Northumlerland. .. «1 «+ «. 122 
On the Advantages that may be expected to result, from the 
Study of the Principles of Stratification ; with Remarks on 
the proper sical of fae in this isk Sis Branch of 
Geology. «+ os fie eee 
On the Work enti ited fe isiernntatias ON, ‘An Essay on the 
Analogy and Harmony of Care oa Figo! tiaie ea 
On Iodine. a oe Pp 
Theorems for determining the Vatties of inereasing ge An- 
nuities. : .» 64 
Memoir of ce AM Gorrie Wane, late Pr ofesior of Mi- 
neralogy at Frieberg. .. ¥ she an ew ~=FS2 
Preface to “The Na sear History - the Mineral Kingdom. pot 
7A 
Geological Queries regarding the Strata of the Vicinity of Brid- 
lington ; and some > Acknowledgements to NaTHANIEL JoHN 
Wincn, Esq., Ge... we on .. 200 
On the Rotary and Orlicular Motions of the Earth.  .. 204 
On Mr. Tatum’s Experiments on Vegelation. .. .. 206 
Remarks on Sir R. Puriirps’s Defence of his Hypothesis. 208 
On Sir Ricwarp Puitrips’s supposed Discovery of the Cause 
of the Phcenomena of Terrestrial Gravitation. — re 
The Description of a Safety FETE beset Explosions 
in Coal- Mines. ; A! 
Remarks on Mr, Murray’s Olijections to ores iments on Vege- 
tation detailed in the Phil. Mag. for July .. t; ale 
Answer to Geological Queries of ‘* A Constant Reader.” 216 
Description of an Apparatus for consuming Fire-damp in the 
Mines without Dange rofan Explosion: a ctasey th re- 
bighting the Miners’ Davy. as 217 
On the new Theory of ‘the System of the (iiedse: Feet?!) 
On Colours —In Answer to Mr. T. HarGreaves’s Strictures on 
the Work entitled ‘* Chromatics ; or, An ark on the Analogy 
and Harmony. oj Colours.” : 241 
A short Account of Horizontal Water- Ww. heels. «2 (296 
On Ebling and Flowing Springs; with Geological Remarks and 
Queries. oe ee ee eo oe ee 267 
On 
