102 ? Correspondence of J. Nickles. 
Dist. between the circles, ' Current a. Current 5, 
ontact, - - - mosh Wale 14 kil. 
Thickness of a leaf of paper, a St 5 
1 mm. - - - - - .5 10 
2% - - - . a 9 12-13 
10 -# : - - ee B65 
14:6 es 
These facts sided: to ths aiding explain the results ob- 
tained by M. Dub, as well as the conclusions which he draws. — 
This physicist, not having sufficiently extended the limit of the © 
separation of the legs of his electromagnet, his limits varying 
tween 24 and 5} inches, obtained nearly invariable numbers, like 
~ aagnich: I mye obtained under the same circumstances 
a 
ae 
: y 
le hi which corresponds to the disal 
commonly used. lecessary abso! eed to reject an arrange 
ment like that given in the wor titled, American Electro 
magnetic Telegraph, an arrangement ich See abst the 
poles should be brought almost in contact, ~“"\\ 
Art. XII. ae of M. Jerome Nickles, a Paris, 
March 1, 1855.—( Continued from vol. xix, p. 416.) 
MUNG AM Aes, et 
Annual Session of the Academy of Sciences.—Distribution of Prizts. 
—This session was opened, as is usual, with discourses and historia 
eulogiums. The distribution of prizes next followed. The Cuvieriat 
Prize, which is given only for works of the first merit, was presed' 
to M. J. Miller, for his Researches into the Structure ind Development — 
of Echinoderms; one of those works ‘“ which have contributed most 10 ‘ 
the philosophy of the science, to — ogeny, zoology and general 
physiology, since the death of Cuvier.” This is the second time thé 
Cuvierian Prize has been given, it havieg been awarded for the first time 
in 1852 to Agassiz, for his work on Fossil Fishes 
of the nerves on tbe nutrition of bones.” Medals were peace ‘0 all : 
the astronomers .who have during vie year 1854 discovered pee : 
to MM. Luther, Marth, Hind, Ferguson, Goldschmidt, and Chaco: 
Three awards were given for i pide oa in the processes used in 
Arts that are injurious to health—one for the substitution of poumin' ie 
