60      Royal  Society .—Mr.  G.  Gore 
on  the  Thermo-electric 
Nitrate  of  Sodium, 
Grains  diluted                  Value  of 
No. 
to  20  ozs.                    Deflection. 
1 
2 
3 
85            ....         *0025    Hot  copper  negative.    )  v  fj  •  j 
255            ....         -03281              VV          ...         \J*m\ 
510                           -1015  (           »         positive.     (  neutral. 
Chloride  of  Sodium. 
Value  of 
No. 
Grains. 
Deflection. 
1.     ... 
12-5  diluted  to  20  ozs. 
•ooon 
2.     ... 
"^         »            >) 
•0012 
3.     ... 
50         „ 
•0081 
4.     ... 
7£>         „           „ 
•0153 
5.     ... 
100         „           „ 
•0293 
6.     ... 
150 
•0512 
Hot  copper  positive. 
7.     ... 
200         „            „ 
•0819 
Tarnish  at  edge  of  hot 
8.     ... 
250 
•1016 
K  liquid,  especially  with 
9.     ... 
300 
•1160 
*  the   strongest    solu- 
10.    ... 
400         „            „ 
•1906 
tions. 
11.     ... 
500         „            „ 
•2241 
12.     ... 
600         „            „ 
•2708 
13.     ... 
800         „            „ 
•3473 
14 
1000         „            „ 
•4884 
15.     ... 
2000         „            „ 
•4237 
16 
Saturated  solution  (undiluted)  -3479^ 
Iodide  of  Sodium. 
( 
drains  diluted      Value  of 
No. 
to  12  ozs.        Deflection. 
1.     ... 
100     ....      -0100    Hot  copper  negative.  [  Liquid  alkaline. 
2.     ... 
1C00     ....      -0819            ,, 
posi 
tive.  f      No  stains. 
Carbonate  of  Sodium. 
Grains  diluted  Value  of 
No.  to  20  ozs.  Deflection. 
1.     . . . .       286  -0468    Hot  copper  positive. 
2 572  ....  -1673    Liquid  alkaline. 
Biborate  of  Sodium. 
Six  ounces  of  a  saturated  solution  diluted  to  12  ounces.     Hot 
copper  was  positive;  value  of  deflection  "0452. 
Grains  diluted 
No. 
to  20  ozs. 
1. 
. . , .         £0 
2. 
. . . .       100 
3. 
....       200 
4, 
. . . .     1000 
Sulphate  of  Sodium. 
Value  of 
Deflection. 
•C001    Hot  copper  negative.  ) 
•0009)  *  (Liquid 
•0016>  ,,         positive,  ("neutral, 
•0170  f  J 
