IN HEX. 



443 



of Hcrculaneum, 367-369— and of his further researches on 



the magnetic phenomena produced hy electricity, with some 



new experiments on the properties of electrified bodies in their 



relations to conducting power and temperature, 377-380 

 Davy (Dr. John) on the urinary organs and urine of two species 



of rana, 130-131 

 Density of the earth, remarks on the mean, 370-372 

 Dive (M.) notice of his formation of Prussian potash, 323 

 Dividing Engine of Ramsden, report on the present state of, 



381-388 

 Dobereiner (Professor) analysis of copper pyrites by, 330 

 Dollond (Mr. G.) account of a micrometer made of rock crystal, 



131-132 

 Duhout (Madame), notice of the alcalino-vegetable poudrettes 



of, 334 

 Dugong, an herbivorous animal from Sumatra, notice of, 370 — • 



peculiarities that distinguish it from the Manatee of the West 



Indies, 375 



Earth (Green) of Verona, analysis of, 276, 277— temperature 

 of the earth at various depths, 338, 339— remarks on its 

 mean density, 370-372 



Earthquake in the island of Zante, account of, 341— in Cuma- 

 neana, 426— on the coast of the island of Celebes, 427 



Edinburgh, progress of public education at, 431 



Eggs, singular preservation of, 342 



Electricity, on the magncticphenomena producedby, 74,126,416 



relation of a remarkable electrical phenomenon, 182, 183 — 



observations on Voltaic electricity, 183, 184— contact in vol- 

 taic electricity, 185— magnetism produced by electricity, 

 185, 186 — notice of electro-magnetic instruments invented 

 by M. de la Rive, 184, 185— of a new electro-magnetic ap- 

 paratus, constructed under Mr. Faraday's direction, for the 

 exhibition of rotatory motion, 186, 187, 283-285— of Sir 

 Humphry Davy's researches on the magnetic phenomena 

 produced by electricity, and of his experiments on the proper- 

 ties of electrified bodies in their relations to conducting 

 power and temperature, 377-380 



Electro-rnagnetical motions, 74, 186,415,416 



Epilepsy, on the use of nitrate of silver in, 189, 190 



Equations of Comets, on the determination of, 137-149 



Ether, inquiries and experiments on the products of the slow 

 combustion of, 64 



Evelyn (Sir G. S.) notice of the re-rocasurement of the cube, 

 cylinder, and spliere used by, in his inquiries respecting a 

 standard of weights and measures, 373 



Evchjn (.John) analysis of the Fumifugium of, 343-348 

 2 G 2 



