Miscellaneous Intelligence. . 453 
which they give rise, must be equally different. Now, St. Helena and 
ape of Good Hope may be considered as places enveloped i in at- 
mospheric columns, which have almost their entire base resting on the 
and not on the land; thence the anomalies pointed out by “Colonel 
bine are very easily explained, and, in particular, it is easily under- 
how there is no AETSSEEN Ss in direction which must in every case 
i ape 
Hope and those shcmats at Algiers, which is avails pa from 
ihe equator, but to the north. An excellent paper by M. Aimé on ter- 
restrial magnetism, inserted in the Annales de Chimie et de Pasmaee 
8d series, vol. xvii, in which he discusses comparatively the observa- 
tions made at St. Helena, the Cape, and Algiers, has singularly facilitated 
a explanation of the anomalies presented as objections by Mr. Sabine. 
however, do not pretend that there does not exist any anomaly ; 
nation of the magnetic needle, and with the absolute intensity of 
errestrial magnetism. But this subject would require, for elucidas 
to be treated more at length than can be done in a letter; I shall 
re stop, and beg to refer those persons who may tel sR 
jon to a memoir which I am on the point of completing, ale 
h will be published forthwith. 
es 5 asa Meeting of the American Association for the Advance- 
Science.—'The semi-annual session of the American Association 
That the papers w were numerous and of apaniea = 
from the testimony of those who were at the meeting. 
iche presided at this asian and the greatest Pt aor gek public 
oie was e njo e bot fre rom the city and in s. ith a 
of pete next. The Local Ot ae will soon 
their circulars of invitation. 
i 
