388 H, Haug on the Electro-motive Force, etc. 
each —. to such a degree as to silence every doubt about their 
wrth 
Hov r, my experiments were open to grave objections, as 
Paibay: ‘tidizated by the sik rose of the results. Indeed, the 
use of acids (nitric acid particularly) from former experiments 
may have caused some polarization to set in.. The time required 
for a series of observations—the diminishing of the direct in- 
tensity usually occurring ‘dusie this time—the change of the 
temperature and chemical an ee of the liquids—the influ- 
ence perhaps existing of the circuit being kept closed during 
the rapid but gradual Saas from one external resistance to 
another—all these circumstances may be considered susceptible 
of bringing on such extraordinary results as those just referred to. 
. 
TaBie fi: 
Bunsen’s battery. Gas coke in nitric a acid. The acids had been used previous . 
a “+ phenechag The platinum wire, when shorter than 8 centimeters, becam 
Rheo- Com- Tan- Internal Electro-mo-|Rheo- Com- Tan- Internal Electro- 
chord. gent. resist. tive fi hord. pass. gent. resist. tive foree. 
0 608° 1-789 60 10°2° 18 658 — 1197 
7 best oes Ta Le 8 14 666 12°16 
8 285 B43 3:48 6:23 {100 66 "115 669 12:27 
10 26-2 “492 3°77 6-77 |'20 57 “099 684 126 
20 19°25 "354 4:89 g-sg (160 45 “O79 T1L 13°15 
40 13-0 281 587 10:6 |200 3°6 063 697 13°05 
Tasie IT, 
The same vet The gas coke, — washing with — = been exposed to 
he drying action of thé’ r for 24 hou rs. The acids. 
Rheochord. Reeadhat Tangent. Int. resist. Rheochord. can: eidsais Int. resist. 
0 55° 4281 eles 100 51 0893 6°67 
10 22-4 4122 4-05 120 43 0752 667 
20 16 2867 5:02 140 3°8 6 6°83 
40 10°5 1853 5-96 160 3°33 0576 679 
79 1388 6-46 180 295 0516 6°75 
80 62 "1086 6-58 200 26 0455 658 
Taste III. 
The same battery, except the gas coke e sciemmaes sf author dey Hees. Het P 
before. Acids the sam 
Rheochord. Compass. Tangent. Int. resist. |Rheochord. ee Tangent. Int. resist. 
0 61° 1°8040 mae 180 28° 0489 501 
10 “4122 2-98 200 25 0437 494 
16 28 378 220 04 50 
40 105 "1853 458 240 2°15 0375 5-09 
60 TS 1370 493 260 + 0 5:13 
615 +1077 5-08 280 9 0332 5°25 
100 5-05 | 300 1-85 082 547 
120 4 0744 5-16 320 18 0814 6 
140 365 0638 6513 340 165 5°52 
