»:Ehe Winds of Kimberley. re ha 93 
for the hours of 6 p.m. and 11 p.m. In view of the fact that time 
has prevented the inclusion of these in this general sketch, all minor, 
even if USER details have had, a fortiori, to be severely left 
alone. Oe Aes 
APPENDIX. 
The general outline of this paper was complete before I had the 
good fortune to consult a remarkable paper by Mr. F. Chambers 
“On the Diurnal Variations of the Wind and Barometric Pressure at 
Bombay.” * Much of the argument therein contained seems to 
‘want further proof; but there is no doubt that the plea for anti- 
convection currents is most ably maintained. As opposed to this we 
have the theoretical opinions of W. von Siemens some seventeen 
years later.t| The latter compares the atmosphere to a number of 
adjacent chimneys in which heated air rises with great rapidity, and 
although these are described as having elastic walls, yet in no place, 
apparently, has this property been brought into requisition. For 
“disturbances are balanced by means of ascending currents,” and, 
moreover, ‘¢if the heating of the lower strata of air takes place 
within a limited area, a local outflow” [wpflow seems to be meant] 
‘occurs, reaching to the uppermost regions of the air.’”’ While 
there is no difficulty at all in understanding that the heated air of 
the whole torrid zone must rise and flow off polewards, even if obser- 
vation had not confirmed it, it does not seem so clear that the same 
result must ‘follow from local and limited heating. Observational 
confirmation,’ at any rate, is quite wanting. Still less is there any 
solid foundation for the further statement that “the maximum and 
minimum air-pressures are effects of the temperature and velocity of 
currents of airin the higher strata of the atmosphere.” It is much 
more antecedently probable that the latter will be eventually 
explained by the principles of the Wave Theory than by causes. so 
remote and changeable. | However that may be, it is quite certain 
is Ep otennical - ‘Transactions, vol. 163, pp. 1-18. Read before the Royal 
Society, June 19, 1873. See also Proceedings a the Royal Society, vol. xxv. 
pp. 402-411. . | 
+ ‘*On the General System of Winds on the Wari ”. Phil. Mag., Dec., 1890. 
t Vide ‘On the Vibrations of an Atmosphere Periodically Heated,” by Max. 
Margules, translated from the Sitzungsberichte der Kinig. Akad. der Wissensch. 
zu Wien, 1890; in Prof. Cleveland Abbe’s Mechanics of the Earth’s Atmosphere. 
Also-a paper by Lord Rayleigh, translated (from Hnglish into puterien) from 
the Phil. Mag., Feb., (1890, in the same volume. » : . 
