Lllhography.—Talavera Wheat, 391 



through it, and the tinfoil will be perforated. Its appearance will 

 strongly indicate a passage from positive to negative. 



Send the charge through a piece of polished steel covered in 

 the same manner, and an indentation will be made in its stirface 

 surrounded by a prismatic ring, which will present a beautiful 

 appearance through the microscope : on the negative side the 

 indentation will be considerably smaller, and without the pris- 

 matic ring. ^' ^' 



It has recently been ascertained, that fogs contain a great pro- 

 portion of water, but not in a condensed state, being kept sus- 

 pended by the opposing powers of the electric fiuid with which 

 it is charged. A convincing proof of it was afforded ijy a curious 

 meteorological occurrence in Westphalia, where, the fog being 

 driven by a gentle north-east wand against the trees, the electric 

 fluid was attracted, condensation and congelation took place, 

 and the largest trees were torn up by the roots, by the prepon- 

 derating weight of ice upon their branches. 



LITHOGRAPHY. 



In our number for March we gave a brief notice of the origin and 

 practice of the new invention of Hthography. We have been since 

 informed, that the first application of it to purposes of u><efaliiess 

 unconnected with the fine arts,was made by tlie Duke of Welling- 

 ton in the peninsular war, for the purpose of accompanying the 

 general orders, instructions, &c. with sketches of positions. 

 A recent Hamburgh gazette slates, that it has also been intro- 

 duced into the department of foreign affairs in Russia, and been 

 the means of superseding a great number of copying clerks. 



TAI.AVERA WHEAT. 



A few years ago, an English gentleman serving with the army 

 in Spain observed near Talavera a fine variety of wheat, some 

 of the seed of which he brought with him to England. It has 

 very long straw, very long ears, and a fine, clear, thin-skiniied 

 grain; it is very prolific ; it succeeds when sown either in au- 

 tumn or in spring ; and it ripens three weeks eavlier than the 

 common wheat of England, in some of the sontiiern counties 

 of which it has been carefully propagated now far five or six 

 years, and has been found to preserve its original character and 

 peculiar advantages. One farmer at I'etworth in Sussex had 

 fifty acres of it this last year ; and he is now selling it for seed at 

 ten guineas the quarter. It is preferred by millers to all other 

 wheat, and is much sown at this time of the year, 



B b 4 CHEAP 



