Analijm of Vol, IX. Part L of the Transactions 
11. On the Madiation ^ Caloric. By tlie Reverend Thomas 
Crompton Holland ; p. 179, — 185. With a Plate. 
In this paper Mr Holland explains in a very perspicuous man- 
ner, upon Prevosf s Theory, the apparent reflection of cold, and 
shews why those surfaces which radiate the most caloric pro- 
duce the greatest cold when cooled, and are most sensible to the 
impressions either of heat or cold from surrounding bodies. 
12. Notice respecting a Reinarlcable Shower of Hail which fell 
in Orkney on the 21^th of July 1818. By Patrick Neill, 
Esq. F. R. S. Ed ; 187,-^01. With a Map. 
An abridgment of this interesting paper is given in the pre- 
sent number, p. 365. 
13. Observations on the Mean Temperature of the Globe. By 
David Brewster, LL. D. F. R. S. Lond. & Edin ; p. 201, — 
226. 
A brief abstract of this paper will be found in vol. hi. of this 
Journal, p, 376. and vol. iy. p. 193. The general formula for 
the mean temperature of the globe under all meridians, which 
is given by the author, is T = 86° 3 Sin D. — 3|°, D being the 
distance of the place from the nearest pole. The position of 
the two poles oJ maximum cold is in 80° N. Latitude, and 100° 
West, and 95° East Longitude Their mean temperature is 
— 3^1 Fahr., though it is shewn that the temperatures are best 
expressed when the Asiatic Pole is taken about 4|° warmer than 
the American Pole. 
14. Method of determining the Latitude from Circum-meridian 
Observations., taken near noon. By Major-General Sir Tho- 
mas Brisbane, C. B. F. R. S. E. ; p. 227,-235. 
By the ingenious method of observing for the latitude, which 
is described in this memoir, one day’s observations will give the 
latitude within a few seconds, and may be equal to those derived 
from the chances of three weeks of ordinary weather. The time 
of noon being ascertained by former methods. Sir Thomas be- 
gins nearly 10' from noon to observe the sun’s altitude from an 
artificial horizon, and continues making as many observations as 
possible, until the sun has nearly the same altitude as when he 
began, which will be at 10' past noon. During these 20 minutes, 
* See Plate IV., in which these Poles have been lai^l down. 
