Royal Society. 239 
'J^he Death of a Dog, on firing fome Vollies of fmall Shot ; 
by Mr. Rob. Clarke. Phil. Tranf. N^ 235. p. 775. 
IN November^ '^691-> upon proclaiming the peace, tv;o troops 
of horfe dilmounted, and were drawn up in a line in order 
to fire^ the centre of their line faced a butcher's door, who 
kept a very large maftiff-dog, a dog of great courage for fight- 
ing- this dog lay a-fleep by the fire fide 5 but upon the firft 
volley, he immediately llarted up, ran into a chamber, and 
hid himfelf under the bed 5 upon a fecond volley, the dog 
rofe, run feveral times about the room with violent tremblings, 
and ftrange agonies; but upon the third volley, he run about 
once or twice, and fell down dead immediately, bleeding at 
mouth and nofe. 
^ Negro Boy dappled "with tvhite Spots 5 by Mr. Will. Byrd. 
Phil. Tranf. N° 295. P- 781. 
THIS Negro boy was born about the upper parts of Rap- 
pahanock river \x\ Virginia -j his father and mother were 
both perfect Negroes^ and the boy himfelf, rill he cixnQ to be 
three years old, was in all refpe£ls like other black children; 
and then, without any diftemper, he began to have feveral 
little white Ipecks on his neck and bread, which cncreafed with 
his age, both in number and bignefs; fo that from the upper 
part of his neck, where fome of his wool v.'as become white, 
down to his knees, he was all over dappled with white fpots, 
ibme of which were broader than the palm of a man's hand ; 
they were exceeding white-, at leafl equal to the ilcin of the 
faireft lady, but of a paler white 5 and the ^t{\\ and blood did 
not flicw fo lively thro' them, as thro' the fliin of white 
people 5 the reafon of which might be, that the fldn of a^ 
Negro is much thicker 3 his face, arms, and legs were perfeflly 
black. 
Concave Specula of a Parabolic Figure attempted', by Mr, 
Sreph. Gray. Phil. Tranf. N° 235. p. 787. 
ALinnen cloth, being firft wet in fair water, and then laid 
on a concave cylinder, as the verge of a fieve, or the like, 
its central parts will delcend, fo as to form a very regular con- 
cave fuperficies; and a thread, being firft wet m common 
water, and then fulpended with its two ends, or any two points 
nearer than their utmoft extent, fo as to touch the cenrre of 
the fufpended clotb, with its two oppofite points on the ring, 
was 
