Resistance by Fluids to Electric Conduction. 39 
We derive from the above a perfectly clear conception of the 
resistance to conduction, which a liquid of definite chemical con- 
stitution presents, and can bring it in calculation, when but for a 
single length and for a single section an accurate admeasurement 
en made. 
_ The results at which I have arrived in the different fluids ex- 
amined by me, are conveniently arranged in the following table. 
The numbers in the columns below need no farther discussion. 
_L have only to add that common platinum plates were employ- 
ed in the liquids ; only, in copper solutions copper plates, and in 
the zinc solutions zinc plates, were used to lessen the polarization, 
ee pelyeons employed were chemically pure. 
tance in 
i ciat’s ‘ EIN ee wie 
Oe ge mgs | tage of Regular ‘ik werd 
eet : For 5 centim. 
Se length of the liquid. 
Sulphuric acid of 1-10 sp. gr. 0°0275 met. 4311 75673 
Cie ee ame 115% « 00275 3-680 67770 
wean = 1:20 “« «& 0:0275 3-202 56180 
ee a rs _ 0-0275 3-200 56180 
cen m 1:30 00275 3-200 56180 
coe a 1-40 0:0275 4°700 82520 
Sulphate of of zinc vate of) : 
which 100 ce. con d 7:287 0275 108-00 1896000 
hie: Zao, SO... F rt : 
75 grm. ZnO, 30,, HO, 0-275 151°70 2663400 
hate of copper ‘solation, 
which 100 ec. contained 0°0275 55:38 972320 
, cad, SO, 
”; “ : «4. Orea7s 80°32 1410200 
For 2°5 cent. 
lorid of ar ge ‘epo-oet ta length of liquid. 
in water, 0°023 19°65 | 577100 
ve 0:023 26°20 | 7694 
ee dilation, . : 0046 25°336 | 1488200 
GG 0046 44°72 50560 
dof * potassium: solution :— 
276 a } arm. in cc. water, 0'023 19°68 | 
‘Twofold dilution, .  . . 0-046 ca 1103700 
peat, 5 3 A 0046 my 
Bhlorid of barium solu 
‘46 grm. aut reer peg water, 9023 37°50 1101300 
0 of 0046 37°07 ; 
oric ater a ‘golutio tio 
eda Speen n 500 ce "water, 0023 26:56 780100 | 
eso solution, ound 22°89 672560 | 
= zine solution, ae oiead 37°20 1092500 | 
These penile for the resistance of the solution of sulphate of zine, I can permit 
recorded only as approximations while the zine precipitate from the li- 
‘Ftsell 
tantly elongating, there appeared 
oten scrape cine, sora! the resistance of the fore- 
