56     Royal  Society : — Mr.  G.  Gore  on  the  Thermo-electric 
perature  of  the  atmosphere  and  sufficient  to  fill  it  to  the  line  F  F, 
is  poured  in ;  the  metal  dishes  are  then  steadily  placed  in  the  glass 
vessels  and  connected  with  the  galvanometer,  taking  care  that  no 
air-bubbles  remain  beneath  them.  As  soon  as  the  galvanometer- 
needles  have  settled  at  zero,  one  of  the  dishes  is  quickly  filled  with 
boiling  water,  and  the  directions  and  amounts  of  the  temporary  and 
permanent  deflections  noted. 
The  following  are  Tables  of  results  obtained  with  various  liquids, 
the  solutions  being  diluted  in  each  case  to  a  specified  measure  by 
addition  of  distilled  water.  Those  of  the  experiments  in  which  20 
ounces  of  liquid  were  used,  were  nearly  all  of  them  made  with  an 
apparatus  in  which  the  connecting-tube  C  was  of  somewhat  less 
diameter  ;  and  the  deflections  obtained  by  that  apparatus  were  less 
in  extent  than  those  obtained  with  the  "  new  apparatus,"  because  in 
the  latter  the  conduction-resistance  was  somewhat  less.  The  values 
of  the  deflections  given  in  the  Tables  are  in  all  cases  those  of  the 
temporary  ones  ;  and  the  liquid  used  for  diluting  the  solutions  was 
in  all  cases  water. 
Pure  Nitric  Acid. 
No. 
1. 
% 
3. 
4. 
5. 
6. 
7. 
8. 
No. 
1. 
2. 
3. 
4. 
5. 
6. 
No. 
1. 
2. 
3. 
4. 
5. 
6. 
No. 
1. 
2. 
Ounces  of  strong  acid 
diluted  to  20  ozs.  with  water. 
i 
IT 
Value  of 
Deflection. 
•0045"!      The  hot  plate  was  nega- 
•0012 
•0039 
•0497 
•1177 
•0356 
•0578 
•4954 
tive  and  much  acted  upon, 
especially  with  the  stronger 
mixtures.  With  the  stronger 
"mixtures  a  little  gas  was 
evolved  at  60°  Fahr.,  and  a 
large  amount  directly  the 
heat  was  applied. 
Pure  Hydrochloric  Acid. 
Ounces  of  strong  acid  Yalue  of 
diluted  to  20  ozs.  Deflection. 
jL                 ....  •0064")      The  hot  plate  was  posi- 
■i                   ....  *0330    tive.     The  amount  of  stain 
i                .....  *1112  [upon  the  hot  plate  was  very 
\                   ....  "2854  |  small,  and  was  in  the  form 
1  ....  *5731  I  of  a  dark  line  at  the  edge  of 
2                  2-0446  J  the  liquid. 
Chloric  Acid. 
Ounces  of  strong  acid 
diluted  to  20  ozs. 
tV 
i 
"S" 
Value  of 
Deflection. 
•0002 
•0016 
•0040 
The  hot  plate  was  nega- 
Weak  acid 
diluted  to  10  ozs. 
:::  i 
upon.     With  the  strongest 
...  *0287  f mixture,  the  liquid  in  con- 
•1234  |  tact  with  the  hot  plate  soon 
♦2005  J  became  green. 
Hydrohromic  Acid. 
Value  of 
Dflection. 
t~,  4q  (     Hot  plate  negative.  Both 
•fV47  i  P^ates  mucn  stained,  the  cold 
f  one  the  most  so. 
