EXPERIMENTS IN JANUARY, 1781*. 628] Some basket salt† was dried before fire, and a saturated so 1 3.78 lution made with it which contained of salt, and also other solutions of different strengths, all being made with distilled water. Sat. sol. in tube 14, salt in 69 in tube 15. [R. 399000.] = Sat. sol. conducts 8.63 times better than salt in 69. Sat. sol. conducts 9-03 times better than salt in 69. Sat. sol. in tube 14, salt in 29 in tube 15. El. = 31. 7.3 11.0 sensib. greater. 9.1 supposed right. sensib. less. Sat. sol. conducts 4.1 times better than salt in 29. Sat. sol. conducts 3.85 times better than salt in 29. The same solutions in same tubes. El. 1. [R. = 136000.] Sat. sol. conducts 3.95 times better than salt in 29. * [The results of these experiments are collected in Art. 695. See Note 33.] [Salt made up in form of sugar loaves, in small wicker baskets, which is thence called loaf salt or basket salt." Rees' Cyclopædia.] [26-45 per cent. Saturated solution at 18°C is 26-4 per cent. by Kohlrausch.] 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. Log. vel. in 15 by D° in 5 = 1.2122, 630] Salt in 69 in tube 22. Salt in 999 in 23. Electrometer = 34. [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 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. N.B. The tubes had been measured between the last trial and this. |