Sat. sol. in tube 14. Salt in 11 in tube 15. EL 19.

Sat. sol. conducts 1.92 times better than salt in 11.

Sat. sol. conducts 1.88 times better than salt in 11.

Sat. sol. conducts 1.92 times better than salt in 11.

629] Salt in 142 put in tubes 5 and 15 in order to find what power of velocity the resistance is proportional to.

Therefore log. vel. in 15 by do. in 5 = 1.2122,

log. length in 5 by do. in 15

=

1.1829.

976 power of velocity.

630] Salt in 69 in tube 22. Salt in 999 in 23.

Electrometer = 31. [R. = 1335000.]

plainly less.

scarce sensib. less.

23

22

Do.

4.3

3.6

3.7

3.4

3.2

3.4

*

Salt in 69 conducts 9.91 times better than salt in 999.

Salt in 69 conducts 10.3 times better than salt in 999.

Salt in 69 conducts 11.31 times better than salt in 999.

[This is the first experimental proof of what is now known as Ohm's Law.]

Salt in 69 conducts 10.75 times better than salt in 999.

Salt in 999 in tube 12; distilled water in tube 20. El. = 2§.

2 or 3 hours after it seemed rather greater at 5.

Next morning was plainly greater at 7.

The water being changed for fresh, seemed rather less at 3

Salt in 999 conducts 20 times better than salt in 20,000.

Salt in 20,000 conducts about 7 times better than distilled water; therefore if distilled water contains 12000 of salt their conducting powers will be as the quantity of salt in them.

Therefore salt in 999 conducts 19.5 times better than salt in 20,000.

Salt in 999 conducts 19 times better than salt in 20,000.

Salt in 999 conducts 19.8 times better than salt in 20,000.

Salt in 69 conducts 1.74 times better than salt in 142.

Salt in 69 conducts 1.84 times better than salt in 142.

Salt in 999 in tube 12, distilled water in tube 20. El. = 21.

Another bottle was filled with distilled water and tube 20 filled up again with that.

631] The tube 20 filled with the same distilled water mixed with zo of spirits of wine.

1 20

Same mixture mixed with more of spirits of wine, id est, sp' wine in 18 of distilled water.

Therefore there is not much difference between the resisting power of the above distilled water and spirits of wine and mixtures of the 2: but of the 2, spirits of wine resists least.