1819] Scientific Intelligence. 317 
MAGNetic 
THERMOMETER. NEEDLE, 
Highest. Lowest. Var, W. 
1762— July..... 17 70°25° Wepre. mia —10°602 — 
1763— July..... 10 18°68 Dec. ... 27 — 2°00 — 
i764— July..... 17 77°00 Dees... 25 — 2°00 — 
1765— July..... 30 T4175 Jan. ... 21 — 4°50 a 
1766— §June.---- “vf 80°60 | Dec.... 24 0-75 i 
. July..., 6 if 
1767— July..... 5 70°25 Feb... 14 — 5:10 ats 
1768— June..... 15 77:00 March. 2 —10°19 — 
1769— July..... 23 78°68 Dec.... 29 — 231 15° 25’ 
1770—  July,eo00 25 | (7750 | Jan... 7 | — 4-00 15 30 
1T71— + June..... 24 15°30 Jan.... 11 —10°75 15 40 
I772— + July..... 28 TA15 Beb.: 4 43 — 9-60 16 6 
1773— June..... 18 77:00 Pebs. ) 2 1-60 16 40 
June..... 16 4 ; 
1774— Say tS. a 70-25 | Jan....12 | — 9-60. 16 46 
1775— Aug. .... 9 79°25 Janye? .°25 3-90 16 58 
1776—  July..... 14 83°75 Jan. 11, 26 0-715 17 30 
WTi— July.. 1, 4 78-60 Feh. 16, 18 — 4:00 17 45 
1778— July... 21, 22 80°40 Feb. .. 20 2:19 17 50 
Jan.... 2 * 
17799— Aug. .... 7 | 79-80 ome Be 10:06 18 00 
June..... 20 “a » 
1780— er te ue 72°50 Jan. 20, 30 6°10 i8 00 
Jue. . as 18 I wan, %, «1: 74 “ 
wrsi— Sanne: FS of 15-90 Meee .. i — 2:00 18 24 
1782— July..... 30 75°30 March . 23 6-10 18 30 
1783— July..... 13 80°90 Pec... 28 —11-31 18 32 
The barometer was placed 201 ells above the level of the sea. 
The observations were made at noon. The observations upon 
the thermometer were made during the winter in the forenoon, 
and during the summer in the afternoon. 
In the original tables, the height of the barometer is given in 
French inches, and that of the thermometer according -to 
Reaumur. In the above, the height of the barometer is-reduced 
to English inches, and that of the thermometer to Fahrenheit’s 
scale. 
XIII. Berzelius’s New Work on Mineralogy.— Specific Gravity of 
Hydrogen. 
This accurate and indefatigable chemist is now engaged in 
Paris in printing a work on mineralogy, which will be ready for 
publication by the beginning of May. " anes 
The same excellent experimentalist, in conjunction with 
M. Dulong, has been lately making experiments with the view 
of ascertaining the sp. gr. of hydrogen and oxygen. They are 
said to have determined the sp. gr. of hydrogen to be lower than 
any preceding chemist had found it, or to be very nearly 0-069. 
