600 Royal Society, 
the approximation of their edges. In saline solutions they become 
rather smaller, but preserve their figure tolerably well. 
In an appendix, the author gives an account of his observations of 
the blood-corpuscles of a new species of Deer inhabiting the mount- 
ains of Persia, of which a specimen has been lately received by 
the Zoological Society. Many of these corpuscles presented the 
singular forms above described. 
A paper was also read, entitled “ Meteorological Register kept at 
Port Arthur, Van Diemen’s Land, during the year 1838.” By De- 
puty-Assistant Commissary-General Lempriere, in south latitude 
43° 9' 6", and east longitude 147° 51' 33". Communicated by 
Captain Beaufort, R.N., F.R.S. 
The height of the instrument above the level of the sea till the 
21st of August was 57 feet, 7 inches ; and during the remainder of 
the year 3 feet. 
A paper was also in part read, entitled “ Experimental Researches 
in Electricity, 16th Series.” By Michael Faraday, Esq., D.C.L., 
F.R.S., &c. 
Feb. 13. — The reading of a paper, entitled “ Experimental Re- 
searches in Electricity, 16th Series.” By Michael Faraday, Esq., 
D.C.L., F.R.S., &c., was resumed and concluded. On the source 
of power in the Voltaic pile. An abstract of this paper has already 
appeared in our Number for April, p. 329 of the present volume. 
Feb. 20. — A paper was read, entitled “ On the Wet Summer of 
1839.” By Luke Howard, Esq. F.R.S. &c. 
The observations of the author were made at Ackworth, in York- 
shire ; and the following are his results with regard to the mean 
temperature and the depth of rain, in each month, during 1839. 
Mean Temp. 
Rain. 
Mean Temp. 
Rain. 
o 
in inches. 
o 
in inches. 
Jan. 
37*04 
1-13 
July 59-30 
5-13 
Feb. 
39-64 
2-14 
Aug. 58-09 
2-94 
March 39-08 
3-21 
Sept. 54*49 
3-43 
April 
44-09 
0-58 
Oct. 48-39 
3-40 
May 
49-94 
0-38 
Nov. 43*14 
4-54 
June 
56-35 
4-89 
Dec. 37-29 
1-85 
Mean temperature of the year 47*24°. 
Total depth of rain in 1839, 33*62 inches. 
He states that the climatic mean temperature of the place is 
about 47°, and the mean annual depth of rain about 26 inches. 
The excess of rain during the year 1839 was therefore very great. 
The author describes the effect of the hurricane of the 7th of 
January, and follows the changes of the weather during the re- 
mainder of the year. 
A paper was also in part read, entitled “ On the chemical Action 
of the Rays of the Solar Spectrum on preparations of Silver and 
other substances, both metallic and non-metallic, and on some photo- 
graphic processes.” By Sir John F. W. Herschel, Bart. V.P.R.S. &c. 
INDEX, 
