Correspondence of J. Nicklés. 
=] 
Rr. XXXIV .— Correspondence of M. J ro N ol 
a June 80th, 1858. 
lents of elements—Dumas h 
ublished in 1822, While looking 
t communicated to the Academy 
Fe 28 
en have equivalents which are Saale 3 of half an equivalent of 
en, Wig he 
o 
a 
i 
i 
to 
a 
—_ 
Cl 355 | Mn 275 | Ni 29:5 | Pb 1036 
Mg 125 Ba 68°5 | Co 295 
_ _ Three have equivalents which are multiples of one-fourth of an equiva- 
lent of hydrogen. 
Al 13°75 Sr 43°75 Zn 82°75 
Among the comparisons that may be made there are the following : 
| i4 || Ph | 31 || As | 75 || Sb | 122 | 
| Ol. | 866 jj Br | oO. |). 1)? | ¥eT | 
umber for nitrogen we have the - 
—122); and adding it to the number for 
word, :f the numbers be arranged on two parallel lines, the ordi- 
ne i become the ordinates of the othe 
more or less close. i 
es oe : a ion at a high temperature of volatile 
Artificial minerals.—By the a = H. St. Claire Deville and _ 
uorids on certain oxygen compo : 
= r é crystals of white and green corundum, 
Caron have caniy. ga zai dl space el and staurotide. The last, a 
Tuby, sapphire, zi > = 
icate of alumina. was obtained in two ways; either by decomposing 
sf nore a fuorid of silicium by alumina. The — 
