C O N^ T E N T S 



OP THE 



THIRTY-FirTH VOLUME. 



On the Means of counteracting the Effects produced ly 

 the Formation of the Gases found in Coal Mines . . 3 



On Expectorated Matter, Abridged from the Philosophical 

 Transactions for \mo • •• •• ^^ 



Memoir on the lest Method of decomposing the Chromate 

 of Iron, obtaining Oxide of Chrome, preparing Chromic 

 Acid, and on some Combinations of the latter ... 20 



Observations on loaded and unloaded Barges, Boats, Beams, 

 or Jlodti?ig Bodies descending with Streams or Currents, 

 and why the heavier End will go foremost . , , . 31 



On Nwvi Materni 35 



Memoir on the Mineralogical Geography of the Environs 

 of Paris . , , , 36 



Account of an extensive Organic Lesion of the Brain, tho- 

 racic and abdominal Viscera, unaccompanied ly the 

 Symptoms usually observed in similar Affections 59 



On Dr, Pearson's Proposal for an Institzitionfor obtain* 

 ing an equal Temperature in Houses 62 



Description of a new Cupping Instrument , , . , 81 



On that Power of the Eye, ly which it is adjusted to see 



Objects distijictly at different Distances .. .• 82 



On a native Arseniate of Lead ,, &7 



Description of a reflective Goniometer , 94 



Chemical Analysis of a Black Sand, from the river Dee, in 

 Aberdeenshire , . , gS 



Analysis of the Gray Copper Ore of Airthrey, in Stirling- 

 shire , 105 



Vol, 35. No. 146. June \B\0. a Hints 



