VOL. XXXIV.] PHILOSOPHICAL TRANSACTIONS. 155 



to have hung just over the beast's eyes; it grows round above this for about 

 a foot or more; then spreads broad, which ends in branches, long and round, 

 turning with a small bend. One of these horns is represented fig. 11, pi. 3. 

 They have also found shanks and other bones of these beasts in the same 

 place. 



A Catalogue of the Fifty Plants fram Chelsea Garden, presented to the Royal 

 Society by the Company of ^apothecaries, for the Year 1 725, pursuant to the 

 Direction of Sir Ham Sloane, Baronet, Pr. Coll. Med. S. P. V. Pr. hy Mr. 

 Isaac Rand, Apothecary, F. R. S. N" SQS, p. 125. 



An Account of an Aurora Borealis, seen in Ireland, Sept. 24, 25, 26, 1725; 

 with a Solution of the Phenomenon. By Arthur Dobbs, Esq. 'N°3Q5, p. 128. 



The theatre of light, forming an irregular variable curve, was, as at most 

 times before, from e. n. e. to w. n. w. the horizon and whole hemisphere serene, 

 little or no wind, what there was seemed northerly. The seeming dawn, or 

 scene of light, generally continued in an irregular curve; the one point in the 

 first two nights began near the horizon, near n. n. e. the other point was at 

 w. N. w. the height of the arch not exceeding 20 degrees, in which there 

 seemed to be a continual dawn; under that field of light seemed to be a dark 

 cloud, which however was a clear sky, not filled with that luminous vapour; 

 because all the stars appeared distinctly and twinkling through it. Whenever 

 that light rose about 10 degrees higher, or to about 30 degrees, then flashes 

 or coruscations followed alternately, and seemed to be columns or beams of 

 light, which followed or succeeded each other, and by that means seemed to 

 move and change by the succession of light and darkness, according to the 

 flashes. When the lighted vapour rose higher, to about 40 or 45 degrees, then 

 the appearance altered, and instead of the beams or columns of light, as when 

 lower, there were flashes like those attending explosions, in which faint colours 

 of red, green, and yellow appeared, but not very vivid ; and on each explosion 

 it would spread upwards towards the zenith, in the appearance of thin enlight- 

 ened clouds, and immediately disappear. On the 26th, about Q at night, one 

 of these irregular arches of light had reached the zenith, the lower points being 

 near e. n. e. and w. s. w. the lower part being a constant fixed light, equal to 

 the light of the edge of a white cloud in the day-time, when the edge shines 

 on it. As it rose higher it was somewhat weaker, and the motion of the co- 

 lumns or beams of light after each flash, seemed by that means to move. 

 Somewhat higher again, at about 40 degrees, the flashes were like explosions 

 of great guns, with the faint colours observed as before; but the coruscations 



x2 



