IMPORTANT SCIENTIFIC INTELLIGENCE, 
m 
ON ALTITUDE BAROMETERS OF 
THE MOST COMPLETE CONSTRUC- 
ITON, BY GEORGE BREITHAUPT, 
OF CASSEL.— The writer states that he has 
devoted much time to the perfecting of these 
important instruments. He describes his 
precautions for purifying the mercury, which 
he prepares from cinnabar, by distillation 
with lime. It is then strained through card 
paper many times, heated nearly to the boil- 
ing point, and filtered into the tube. The 
nonius scale he forms of the most delicate 
Lind, extending to millimetre i line and 
adjusts a microscope to it. 
DESCRIP ITON OF AN APPARATUS 
FOR ASSAYING SlLVl.R, IN I HE 
WET WAY, BY E. JORDAN, OF CAS- 
SEL.— This is somewhat similar to the ap- 
paratus described by Gay Lussac, in his work 
upon the assay of silver. It differs in this 
respect, however, that by the proceeding of 
Jordan the contents of an alloy are determined 
in the direct way. 
OBSERVATIONS ON THE DECLI-. 
NATION AND DAIi.Y VARIATION 
OF THE NEEDLE A T PEKIN, BY Hr. 
KOWANKO, MEMBER OF I'HE IM- 
PERIAL RUSSIAN MISSION AT PE- 
KIN, COMMUNICATED BY A. T. KUP- 
FFER.— The observations were naade with 
Garabey’s declination compass. The wes- 
terly declination was found to be for March 
1832, 2^ 15' 42". The westerly progress of the 
needle from December .1831 to March 1832, 
was 12'. At Petersburgh, during the same 
time the easterly deviation was 3 , where the 
total deviation was on the 22d and 23d De- 
cember, 6^ 27 5 ', and on the 2Uth and 21st 
March, 6® 23' 58". Hrn. G. Fuss, who pre- 
ceded Kownanko at Pekin, found the decli- 
nation there in December 1830 1° 38 W, in 
May 1831, P 55' VV, and in June 1831, P 
48' W, 
The needle reached its easterly variation 
on 2 1st December at 9 a. jvi. On 22d De- 
cember at 10 A. M. On 20th March at 9 a. 
M., and on 21st March at 9 a. m. While its 
westerly daily variation was a.s follows . 21st 
December, 2 p. m. var.= 4' 10" 22d Decem- 
ber 2 p. M. var. = 2'20th March . 2 p. m. 
var- = 5' 41" 21st March . 2 p. m, var. =6'. 
M A G N ETI C A I, O BS E R V AT 1 0 NS AT 
N E RTSC H I N S K , COMMUNICATED 
BY A.T. KUPFFER.— Cancrin found the 
inclination of the needle at this place, on the 
5th August 1832, at 10 a. m. 66^ 33' 4". 'The 
declination on 5th August, 2 to 4 p. m., was 
4° 14' 15" W. 22d September 4° 7' 43" W. 
ON THE MAGNETISM OF THE 
EARTH, BY PROF. L. MOSER, OF 
KONIGSBERG.— In a previous paper, Mo- 
ser endeavoured to prove, from various data, 
that the magnetic intensity of the earth is 
.situated on its surface. He follows up the 
subject in the present paper. He considers 
as demonstrated, that the magnetic distribu- 
tion over the earth is proportional to the line 
of its breadth, and calculates the inclination 
and intensity. He also discusses the theoreti- 
cal grounds from which the temperature of 
the earth has been calculated by mathema- 
ticians. He calculates the intensity to be in 
54® 42' 50' N. L., TG037, and the inclination 
71® 8' 20'. The mean temperature of the north- 
ern hemisphere he finds 15® R. (65“f) in 
the 30th® of latitude. That of the southern 
hemisphere is 63°. 34. 
MAGNETIC INFLUENCE PRO- 
DUCED BY THE ELECTRICAL MA- 
CHINE, — M. Llambias, of Port Mahon, in 
a communication to the Academy of Paris, 
observes that magnetism can be developed in 
this way. 'Fhe two electrical currents in a 
metallic conductor discharged from a Leyden 
jar, may be separated, at least, in part, by 
having the conductor adjusted so as to 
separate into two or more arms, which gives 
origin to a spark in any arc or part of the 
same, where the two currents unite in passing 
through ; it is in general the positive sireaiti 
(that proceeding from the positive to the 
negative pole) which contiacts the power of 
communicating the magnetic influence. 
LIST OF EARTHQUAKES, VOL- 
CANIC ERUPTIONS, AND RE- 
MARKABLE METEORIC APPEAPv- 
ANCES SINCE THE YEAR 1821, BY 
K. E. A. V. tlOFF,9Tn PART. — This forms 
the concluding portion of an important list of 
meteoric phenomena, registered with con- 
siderable minuteness. It terminates with a 
summary exhibited in the following tables, 
comprehending 10 years, from 1821 to 1830 
1 
KARTHQU AKE5. 
VOLCANIC 
EliUPTIONS. 
NORTH 
SOUTH 
NORTH 
j SOUTH 
HEMISPHERE 
HEMISPHERE 
HEMISPHERE 
! HEMISPHERE 
January 
31 
2 
1 
0 
February 
36 
0 
2 
1 
March 
31 
1 
2 
0 
98 
3 
5 
1 
April 
29 
1 
1 
2 
May. 
33 
3 
0 
0 
June 
33 
1 
1 
0 ! 
95 
5 
2 
2 
July.... 
20 
3 
2 
i 
August 
31 
2 
1 
0 
September. 
24 
3 
0 
0 
75 
8 
3 
1 
October 
41 
2 
2 
November 
26 
1 
1 
1 
December 
34 
1 
4 
1 
! 101 
4 
6 
4 '1 
Total 
369 
20 
16 
8 
