1822,] Philosophical Transactions for 1822, Part I. ‘875 
tropic ; and various Bushmen, as he proceeded south, inquired 
if the quaggas were coming. Their stay lasts from two to three 
months, which in that part of Africa is called the Bushmen’s 
harvest. The lions who follow them are the chief butchers. 
During that season, the first thing a Bushman does on awaking 
is, to look to the heavens to discover vultures hovering at an 
immense height; under any of them he is sure to find a quagga 
that had been slain by a lion in the night.” . 
These are succeeded by observations on the docile and tame- 
able character of the elephant, and on the savage and stupid nature 
of the rhinoceros, which are followed by some inferences respect- 
ing the latter subject, from the diminutive cavity of the cranium, 
and consequent smallness of the cerebrum in the last-mentioned 
animal. An account of the manners and habits of the Asiatic 
rhinoceros, kept for three years in the menagerie at Exeter 
Change, is subjoined; and the paper concludes as follows : 
“ The account in the Bible of an unicorn not to be tamed, 
mentioned by Job, has so great an affinity to this animal, that 
there is much reason to believe that it is the same, more espe- 
cially as no other animal has ever been described so devoid of 
intellect. Inthatage, the short horn might readily be overlooked, 
as it cannot be considered as an offensive weapon; and the 
smoothness of the animal’s skin would give it a greater resem- 
blance to the horse than to any other animal.” 
_ VI. Extract of a Letter from Capt. Basil Hall, RN. FRS. to 
William Hyde Wollaston, MD. £RS. containing Observations of 
a Comet seen at Valparaiso. 
VII. Elements of Capt. Hall’s Comet. By J. Brinkley, DD. 
FRS. and MRIA. and Andrew’s Professor of Astronomy im the 
University of Dublin. (In a Letter addressed to Dr. Wollaston.) 
This comet, which had been seen by astronomers in Europe, 
before it passed its perihelion, remained visible at Valparaiso for 
33 days, and Capt. Hall has furnished a valuable set of observa- 
tions on it, from which Dr. Brinkley has deduced its elements 
by an improved mode of calculation. “On April 8, 1821, it was 
distant nearly 1-41 from the earth, the sun’s distance from the 
earth being unity, and on May 3, when last seen, about 2°64. It 
is interesting to astronomers on account of its small perihelion 
distance ; out of 116 comets in Delambre’s Catalogue, the orbits 
of which have been computed, there are only three that pass 
nearer the sun. In'this, as well as in its great inclination, this 
comet agrees with that observed in 1593, whence it is probable 
that they are the same. Some sketches of it by Capt. Hall are 
annexed to his letter in a plate. 
VIL. On the Electrical Phenomena exhibited in vacuo. By 
Sir Humphry Davy, Bart. PRS. 
It is remarked in the commencement of this highly interesting 
paper, that the relations of electricity to heat, light, and chemi- 
cal attractions, together with the discovery of its connexion 
