METALLIC COMPOUNDS, 
3S 
Polar or vol- 
taic electricity 
of extensive 
influence t 
thronghou 
nature. 
light is always directly as the density of the gas, and inversely 
as its conducting power for electricity. 
We might conclude, a priori , that the light ought to appear 
stronger, the greater the resistance to be overcome, and that 
for this reason it is brighter in carbonic acid gas and oxigen gas, 
when dried, which have a more considerable specific gravity 
than hydrogen and atmospheric air. 
If we compare these observations on the colour of the elec- 
tric spark in different mediums with the remarks of Ritter, and 
the experiments of Rochon, Herschel, and Leslie, on the power 
which generates heat, and with the interesting results of 
Scheele upon the reduction of the simple rays of the prismatic 
solar spectrum ; if we consider, in the next place, the relation 
between these phenomena and those of the galvanic battery, 
we shall have reason to conclude, that the time has arrived 
when the polar or galvanic electricity ought to be recognized 
as the principal agent in all chemical phenomena. Analytical 
researches of this description are calculated to throw great 
light upon every department of philosophical knowledge. 
VII. 
An explanatory Statement of the Notions or Principles upon 
which the systematic Arrangement is founded , which was 
adopted as the Basis of an Essay on Chemical Nomenclature. 
By Professor Berzelius. 
( Continued from p. 3\g, Vol. XXXIV.) 
Stibiate of riPHE manner of obtaining this salt is to burn one part of 
potash. JL antimony in powder, with six p. of nitre in a crucible, 
and give the greatest heat it can support without fusion. It 
is then to be reduced to powder, and washed with cold water 
as long as the water extracts either alkali or nitrate of potash. 
The water at last leaves a powder of an acrid and slightly me- 
tallic taste, very little soluble in cold water - } but boiling water 
dissolves a large part of it if exposed to its action for some 
hours. The liquid, if filtered while still hot, throws down 
nothing by cooling. When evaporated to the consistence of 
syrup 
