VOL. XXXVII.] PHILOSOPHICAL TRANSACTIONS. 571 



tube being excited, nnd applied near the end of the Hne, the electric virtue was 

 conveyed by it to the cork ball, and it attracted strongly when the ball was not 

 less than 2 feet distance from tiie line. 



Dec. 11, being a hard frost, and a fair day, he repeated the experiment, 

 making use of a large hoop about 40 inches diameter, and setting it perpendi- 

 cular on a hollow cylinder of glass, 6 inches long, and 5^- inches diameter, so 

 placing the hoop that the line of communication might pass through, or at 

 least very near the centre of it; then applying the tube to the end of the 

 line, an attraction was communicated to all parts of the hoop, attracting a 

 pendulous white thread at the distance of about half an inch. He then set the 

 hoop so as the inner surface of it might touch the line ; then communi- 

 cating an attraction by the excited tube to the packthread, the attractive virtue 

 was carried by it to the hoop, causing it to attract with that force, as with the 

 remotest part of the hoop to attract the thread at a distance of about 4 

 inches. 



Some time after he made the following experiment. The large hoop being 

 set upon the glass cylinder, and the packthread passing through, or near its 

 centre, the tube being applied near the hoop, gave it a strong attraction, so 

 that it would attract a tliread at the distance of 7 or 8 inches, and at the same 

 time an attraction was communicated to the packthread. He then suspended 

 an ivory ball, of 1 inches diameter, at the other end of the packthread, and 

 applying the tube to the hoop, an attractive virtue was carried to the ball, so 

 that it would attract the pendulous thread at the distance of near an inch. He 

 then placed the ball in or near the centre of the hoop ; and now it was so far 

 from being attracted, that it was repelled by the ball ; but it was attracted by 

 the packthread passing to it in the arch of a circle, whose centre seemed to be 

 that of the ball. 



Ephemerides Meteorologies, Barometriccc, Thermometricce, E/jidejniae, Mag- 

 netise, Ultrajectiniv, coyiscriptce U Petro F'an Muscheiibroek, &c. Ultraj. Annis 

 1730 eM73]. N°426, p. 408. 



Omitted for the reason before given. 



Of a very extraordinary Fossil Skull of an Ox, with the Cores of the Horns. 

 By Mr. Jac. Theod. Klein, Secret. Dan. et F. R. S. W A'l6, p. 427. 



Near the city of Dirschaw was dug up part of the skull of an ox, with the 

 cores of the horns, which in all probability must have been prodigious. 



The root of the horns was I foot 6 inches in circumference. And the cores 

 1 1 inches in a straight line. 



4 D 2 



