208 Scimtiji'c Intelligence. ' 
likely to be observed with accuracy, and carefully recorded. 
Our countryman Colonel Beaufoy, has the merit of having be- 
gun these observations so early as 1813 ; and the Board of 
Longitude of France have caused an excellent apparatus by 
Fortin, to be placed in the Royal Observatory for the same pur- 
pose, while Marshal the Duke of Ragusa has placed a similar 
one at his chateau at Chatillon sur Seine. A singular change 
was observed both at Paris and Chatillon on the 31 st October 
1818, and also at Bushey Fleath by Colonel Beaufoy, which M. 
Arago j iistly ascribes to the influence of the aurora borealisy 
which was observed at Bishopwearmouth on the same day. See 
Ann. de Chim. et Phys. Jan. 1819. 
23. Magnetic Observations made during the Arciic Expedition. 
— The following table, shewing the dip and variation observed 
on the ice, out of the ship’s attraction, contains the observa- 
tions made during the Arctic Expedition that are most to be 
depended on : 
Latitude 
North. 
Longitude 
West. 
Variation. 
Rip. 
73® 23' 
29' 
57® 35' 
45" 
80C 
' 01' 
22" 
74 
01 
20 
57 
56 
00 
80 
30 
16 
75 
32 
00 
60 
85 
00 
88 
13 
00 
75 
51 
30 
63 
00 
15 
87 
49 
52 
75 
58 
56 
64 
41 
15 
91 
.17 
00 
75 
49 
38 
64 
45 
00 
90 
17 
42 
75 
50 
30 
64 
42 
45 '• 
91 
33 
22 
75 
54 
58 
65 
39 
45 
92 
44 
20 
76 
29 
46 
72 
54 
00 
103 
41 
14 
85® 43' 15.5" 
76 
32 
45 
■77 
18 
00 ■ 
107 
56 
16 
76 
08 
28 
'78 
48 
15 
109 
Ql 
42 
85 
59 
17 
76 
44 
00 
75 
20 
00 
86 
08 
37 
70 
35 
30 
77 
57 
05 
86 
33 
20 
II. CHEMISTRY. ■ 
24. Thenards recent Experiments on Oxygenated Water. — At 
the meetingof the Institute, on the 29th March 1819, M. Thenard 
announced, that he had obtained water, which contained in- 
weight, double its usual quantity of oxygen, that is 100 parts of 
water may absorb 88.29 of oxygen. This oxygenated water 
possesses remarkable properties. It is colourless, and has no 
smell in ordinary circumstances, but a particular odour in a va- 
cuum. Its taste is astringent. ' It acts upon the skin like a 
sinapism. Its specific gravity is 1.45. When a drop of it is 
let fall upon ..a stratum of oxide of silver, placed at the bottom 
