CONTENTS. 
On a new Method of obtaining pure Silver; with Observations 
on the Defects of former Processes. «. ye os, 204 
Brief Remarks on some indigenous Roses. SAN er 
On Dr. Murray’s Opposition to Professor PRevost’s Theory 
of Radiant Caloric ; on Electrical Phenomena, and on Sir 
H. Davy’s Safe Lamp. aie bey a ee 
Description of the Menagerie at Scheenbrunn in Austria, 249 
Mr. Hume on Emetic Tartar. ne ee waht 2a 
.. 265 
On constructing Electric Columns. .. e 
Report of the Select Committee of the House of Commons on 
the Elgin Marbles, &c. e a ha 
On certain Electrical Phenomena. .. os ahs roe 
On preserving Potatoes for Sea Store or Exportation. 288 
Description of Mr.Puitiirs Lonpon’s Hydrometer; with Re- 
marks on the curing of Mackerel for Exportation or Winter 
Use. ee ee oe ae ee ee ve 329 
On the State of the Manufacture of Sugar in France. 331,416 
Description of an electrical Instrument called “ The Thunder- 
storm Alarum.” ce ee as .. 344 
Account of a Meteoric Stone which fell in the Environs of 
Langres. se ee ee ee ee oe 349 
On the Metallic Salts. hs Nauta gare 
A Letter from Dr, Wititam Ricuarpson to the Countess of 
Gosrorp (occasioned by the Perusal of CuviER’s * Geological 
Essay”), describing the Arrangement of the Strata for sixty 
Miles on the South and as many on the North of Gosford 
Castle, in Armagh County in Ireland, a aie, ape 
On the relative Heights of the Levels of the Black Sea and 
Caspian Sea. ht an ave a's sie nOOA 
On the Quantity of ligneous Matter which exists in some Roots 
and Fruits. ze ve ° oe rap ides 
Dr. Gitny’s Description of Mr. Strert’s Patent Blowing 
Machine. %: = ae + oe .- 372 
On the refractive and dispersive Powers of certain Liquids, 
and of the Vapours which they form. ve ee: 
