108 Scientific Intelligence. 
T have ascertained that the pere a pone Mn Cl? can really be obtained, 
and that the same is true of Mn and MnI?. Various processes le ad 
to this conclusion; the most sopoMinih requisite is to use as little water 
as poss ssible. n : aking in a tube, welt mvoletss a of manganese 
S02,S, Ph, Al, Fe, Zn, PbS, SbS3, ke. ; it takes moistures from the air, 
and speedily undergoes alteration, giving out the gas CIH. In the pres- 
ence of much ether it dissolves, changes color and becomes red, like 
mineral chameleon 
To perform the experiment in a public Jecture, a little MnO? in a 
is put into a white dish, and ether saturated with chlorhydric gas 
poured upon it. It is sited with a glass rod, and immediately the quid 
becomes of a beautiful green color 
In default of ether selina iad with CIA, chlorhydrie acid ina saturated 
aqueous solution may be used ; in this case the liquid becomes at first 
brown, but it turns green when ether is added. It is a very beautiful 
experiment. 
The bromohydric and iodohydrie acids act in the same manner, The 
products, however, are less stable than those obtained with MnO?. The 
ioxyd of manganese gives similar results. At the same time I as- 
certained that the formation of the sesqui-iodid, Fe? I, whose existence 
has been denied by Gmelin and others, is nevertheless possible when iodo- 
hydric gas is made toact upon peenionr des of iron and anhydrous ether in 
a very cold tube. Its stability is not 
n France the perchlorids ipewh lores) bear the name of singulo- 
chlorids (chlorures singuliers) conforming to the denomination of singulo- 
oxyds which Roma as imposed upon _peroxyds, such _ _ O?, PbO, 
BaO?, &c.— Annales de Chimie et de Physique, [4], v, 1 
9. Waling one of Boron with the Hal or oes ae boracie 
acid dissolved in absolute alcohol, and treated with a current of ahs or 
BrH, acts like the oxyd just spoken of; et is, its oxygen separates 
from. the chlorine and bromine so that i orms chlorid or roma of 
the gas CIH, containing boron ; the thermometer rapidly rises to 85 
The residue is boracie acid. The volatile nai is oe ia ether, 
BoO’ +5(C*#H5O)-+-9HO. ee 
With boracic acid, anhydrous thers and dry Os, analogous resulls 
are obtained, if heat at 100° be ¢ mployed. 
Bromid of boron, Bo Br’. —'he acid BrH gives very nearly the same 
results. The ethereal liquid collected at 115°C. has the formula Bo Bré+ 
13(C#H®O?)-+-3HO; or rather Bo Br8+-13(C*+H®0)+16HO, oe 
