190 Foreign Literature and Science. 



34. Magnetism. — Professor Hansteen, of Christiana, has 

 announced the discovery, that all vertical objects, such as a 

 tree, a wall, a steeple, &c. naturally becomes magnetic; the 

 inferior parts acquiring a north, and the superior a south po- 

 larity. We shall wait impatiently for the particulars of these 

 experiments. This subject has acquired a most lively inter- 

 est in the estimation of philosophers, since Mr. Oersted has 

 shown the relation between the magnetic, and electric fluids. 



Rev. Ency. 



35. Orangeries. — The inhabitants of the maritime Alps de- 

 rive important profits from the cultivation of the orange. The 

 town of Menton is the most famous for this fruit. It is 

 gathered during the whole year. A good orange tree yields 

 annually 2000 oranges, lar^;e and small, and occasionally 

 the produce amounts to double that quantity. Those des- 

 tined for commerce are gathered in winter, just as they be- 

 gin to ripen, and become matured during the voyage. — 

 Every orange must be wrapped in a separate paper envel- 

 ope. The gathering, and packing occupies many hun- 

 dred people. Considerable profit is also derived from the 

 orange flowers. A singular fact is, that the orange tree 

 communicates a bitter taste to the herbs that are cultivated 

 around it. The citron has not this disadvantage. 



Rev. Ency. 



36. Agriculture. — Count Lasteyrie, of Paris, who has dis- 

 tinguished himself by his generous efforts in introducing, and 

 perfecting the process of lithographic printing in that me- 

 tropolis, has just completed the second, and last volume of 

 a pictorial representation, and a verbal description of the ma- 

 chines, instruments, utensils, constructions, apparatus, Uc. 

 employed in rural, and domestic economy, according to de- 

 signs made in different parts of Europe. The work is in 

 quarto, and contains more than 1200 machines. The plates 

 are executed without great attention to elegance, but with 

 requisite precision, and exactness. 



37. Measurement of the meridian. — Operations relative 

 to a new measurement of the meridian, were commenced 

 during the last summer, in the Russian provinces of the 

 Baltic. Struve, professor of astronomy, and rector of the 



