254 Existence of Radicals in the Amphide Salts disproved 
which is here described. Should any additional illustration be 
requisite, it will be found in a note subjoined.* 
75. I will, in the next place, consider the phenomena onssevel 
by Professor Daniell, when solutions of potassa and sulphate of 
copper, separated by a membrane, were ee the medium of a 
voltaic current. 
76. Of these I here quote bis own sceount—(Phiosobicl 
Magazine and Journal, Vol. xvi, p. 172)— 
“A small glass bell, with an aperture at top, had its mouth closed by 
tying a piece of thin membrane over it. It was half filled with a dilute 
solution of caustic potassa, and suspended in a glass vessel containing a 
a neutral soluiian of dae * oe below the surface of which 
nie easy t fedora hawn bhmidlegnmobe sap rietaiie aa oxygen and acid 
“tt 
- atthe anode, and soda and hydro, n at the cathode, may ensue, simply by the 
Wish he followin, ’ 
electrolyzation of the alkaline base & ‘association of formule 
- Anhydrous sulphuric acid is represented by the usual formula, SO. 3 oxygen by 
the usual symbol, ; sodium by Na; bite acting asa solvent, by HO. Each 
atom of oxygen, sodium, or acid, is numbered from right to ets 1, 2,3, A, 80 that 
the change of pant on consequent to electrolysis may be see 
te os rat: 2. 4. a 
Anode 0 At 3: 6 Oo HO Cathode, 
2 2. 3. 4, 
Na Na Na Na. 
1 2, 3. 4 
sO3 SOs sO3 SO3 
HO HO HO HO mee, : 
1. 2 ne Bas ae ‘ pes 
Anode 0 O 8) oO @) -H . Cathode. — 
1 2. 3. 4. 
mar rr tet Tr 
Na Na Na Na 
2. 3. 4. 
—_ wn 
SOs. $03 803 S03 
HO 
oh : HO gs ee 
As the atoms che eh in the porand pe Se a of oxygen. (1), is 
Sac ¢ 
at the anode, the atom of sodium, ‘Na, with which it had been united, having been 
ansferred to the second — of F sulphuric acid, which had Set its sodium to 
( 
the third atom of acid, S03 3, this having, in like manner, yielded i its aaaege to 
as 
the fourth atom of acid, $03, from. which the fourth atom of seit Na, had 
been abstracted by the electrolytic power. The atom of sodium thus removed 
from the fourth atom of acid, is represented in union with the oxygen of an atom 
of Sutera Seth the e hydrogen, H, is at the cathode. 
