364 Discoveries in Magnetism and Electricity. 



In the following figure, the sections of the wire are shown 



dissimilarly electrified, by which similar magnetic powers meet, 

 and consequently occasion a repulsion. 



Art. XV. — Letters of the Cavalier Enegildo Frediani, 



known amongst the Arabs by the name o/' Amiro, to the 



Marquis of Ischia. 



Palmyra f 17 December j 1818. ' 

 Sublime Genius i 



I COULD not write to Canova with a better title. Before 

 I speak to you of these memorable antiquities, I wish to call to 

 your recollection what I antecedently observed. 



Departing with your prosperous omens from the beautiful 

 shores of Italy, I steered along the islands of Elba, Corsica, 

 Sardinia, -^ga, Sicily, and Iperia, with the rock which the 

 carefully-wrought saying of Fenelon rendered more brilliant, 

 and, having discovered Crete, celebrated for its labyrinth and 

 the birth-place of Jove, I finally dropped down upon the long- 

 desired, and to me delightful, land of Egypt. 



Turning first towards the Titanian column that bears the 

 name of Pompey, and which, rises like a giant more than 100 

 feet ; then to the Watch-tower and Obelisks of Marc Antony, 

 I left the city of Alexandria, and passing by sea the voluptuous 

 Canopus, I arrived at the mouth of the miraculous river, upon 

 advancing into which 1 felt myself the possessor of a new 

 life. Having viewed the trough of the sea at Bolbitina, the 

 canal of Cleopatra, and the land once made fertile by the Mile- 

 sians, I arrived in the city of Grand-Cairo, where a well, said to 

 be Joseph's, and an aqueduct, not very modern, detain but little 

 the traveller. 



