Royal  Society ;  — Mr.  <x.  Gore  on  the  Thermo-electric 
No. 
1. 
2. 
No. 
1. 
% 
3. 
'4. 
5. 
6. 
7. 
8. 
9. 
No. 
1. 
2. 
3. 
4. 
5. 
6. 
7. 
a 
9. 
lodate  of  Potassium. 
Value  of 
Deflection. 
Grains.  (     Hot  plate  negative. 
!  100  diluted  to  12  ozs.  -0064  J  Both     plates  ,  much 
Saturated  solution  (undiluted)  •0100  1  stained  by  formation 
(  of  iodide  of  copper. 
Acid  Carbonate  of  Potassium. 
Value  of 
Grains.  Deflection. 
50  diluted  to  20  ozs.  -0049 
100      „  „  -0170 
200      ,,  „  -0497 
400      „  „  -0818 
600      „  „  -1329 
800      „  „  -1978 
1000      ,,  „  -2441 
2000      „      .     n  -4210 
Saturated  solution  (undiluted)   -5451^ 
Carbonate  of  Potassium. 
Value  of 
Deflection. 
•01221 
•0382 
•1770 
•3719 
•7521 
2-2400 
3-7708 
•4367 
Saturated  solution  (undiluted)    "4031 
Hot  plate  positive. 
The  liquid  on  evapo- 
ration was  green  with 
>dissolved  copper.  Li- 
quid alkaline. ,  Hot 
plate  alone  much  tar- 
nished. 
Grains. 
50  diluted  to  20  ozs. 
100 
200 
400 
800 
1600 
2400 
3200 
>Hot  plate  positive. 
Acid  Sulphate  of  Potassium. 
Saturated  solution  (undiluted).  Value  of  deflection  *1047,     Hot 
plate  negative. 
Bichromate  of  Potassium. 
Grains  diluted  Value  of 
No.               to  20  ozs.  ■  Deflection. 
1 295                     ....  '0785 1  -rj-  ,        ,  ,        ... 
2.     ....       590                    ....  '1544  J                    positive. 
No. 
1; 
2. 
Grains  diluted 
to  20  ozs. 
..     249-8 
. .     499-6 
Chrome  Alum. 
Value  of 
Deflection. 
•0019 
iHot  metal  negative. 
Liquid  of  acid  reac- 
tion. 
Aqueous  Ammonia. 
.  Copper  in  a  mixture  of  4  ounces  of  water  and  400  grains  of 
aqueous  ammonia  at  180°  Fahr.  was  electrO-positive  to  copper  in 
the  same  mixture  at  60°  Fahr. 
