266 Correspondence of J. Nickles. . 
After completing the design with every possible care, M. Secchi has had 
copies taken by photography, one of which he has sent to the Academy, 
The crater or annular mountain has two circuit walls. The outer, which is 
the lowest, has a diameter of about 48 seconds (one second corresponds to 
1820 meters); the inner, the true border of the crater, has a mean diam- 
a 
line, outside, both north and south, there are some small craters 
After having established the perfect resemblance which exists between 
e 
in the moon is actually extinct, can be answered only after there shall 
that he has undertaken the work above described. 
Meteorological System of France.—N otwithstanding the enemies of 
i - communication, the 
servers under administrative direction was required, which should be. 
perpetual and independent of the direct action of those constituting it 
This is now realized, the stations being established within the telegraphic 
bureaus, the assistants in which have Je a good education. The num- 
ber of stations is now 25, and they are situated in the principal basins of 
France. Each person in charge of a station is required to make three ob- 
servations a day, but may make more at his pleasure. These observa 
ations are registered in a book kept at the station; and at 7 or 8 o'clock 
in the morning they are reported by the telegraph according to er 
certed formula, to the Paris Observatory, where they are recorded on spe 
cial registers, to be tabulated and published. 
* The more thoroughly the volcanic mountains of the moon are studied, the —_ 
completely do they sustain the resemblance to the great boiling lava craters 
of the Moon, in urnal, volume ii, 
Kilauea of the Hawaian Islands, as pointed out by the writer in an article 00 the 
Sooaag —-< i) and Series, page 830, 1846— — 
fe 
