Electro- Magneiism. — Fascination. 



237 



I 



three lines intersect in one common point withLa the triangle, 

 and that this circumstance of intersection has not been de- 

 monstrated in any of the books of geometry with which I am 

 acquainted, I will thank any of your ingenious Correspondents 

 to give a genuine Euchdian demonstration of this, without 

 bringing in to his aid any proposition beyond the 47th itself." 

 J. Hamett. 



ELECTRO-MAGNETIC ROTATION. 



The electro-magnetical revolving cylinders of zinc and copper 

 as first contrived by M. Ampere, and improved by Mr. Marsh 

 of Woolwich, certainly rank among the most pleasing instru- 

 ments for exhibiting electro-magnetic rotation that have yet 

 been contrived. It gives us pleasure to introduce to the public 

 a still further improvement upon this apparatus. 



Mr. Sturgeon, a pensioned artil- 

 leryman of Woolwich, who has suc- 

 cessfully devoted himself to scentific 

 pursuits, has constructed the appa- 

 ratus with two sets of revolving cy- 

 linders, one suspended on each pole 

 of an inverted horse-shoe magnet, as 

 the annexed figure illustrates. Upon 

 the usual insertion of the diluted ni- 

 tric acid the two sets of cylinders si- 

 multaneously enter into rotations in 

 a very interesting or striking manner. 

 This form of the magnet gives the ad- 

 vantage of increased power on a re- 

 duced altitude, and the proximity of the poles materially aug- 

 ments the rotation of the opposed cylinders. The effect is the 

 most pleasing we have ever seen, and was witnessed at the 

 house of Messrs. Jones, opticians, Holborn. 



FASCINATION. 



A very singular fact occurred at Manchester (U.S.) a few 

 days since. As Mr. Samuel Cheever was at work in the 

 field, his attention was arrested at the sight of a number of 

 fowls, with heads erect, and wings extended, standing in a 

 circular manner. On going near to ascertain the cause, he 

 saw a large black snake of five feet in length within the circle, 

 and his squamous head elevated eight or nine inches above 

 the surface of the earth, while his posterior parts remained in 

 a spiral form. And so complete was the fascination, that 

 Mr. Cheever was under the necessity of getting a pole to 

 disperse tlie fowls, in order to kill the snake, in which he 

 happily succeeded. — Salem Register^ Aug. 2. 



Meteoro- 



