. A treatise on electrolysis and its applications to therapeutical and surgical treatment in disease . t be taken,allowance being made forthe slight difference between its electromotive force and the volt, (adding 5 ohmsto every 100 in the first instance; subtracting 2 ohms in the second.) 268 ELECTROLYSIS. In the year 1870 1875 1880 In Zurich Dublin Turin Vienna Koenigsberg The angle produced by a given current on a given galvanometer beinginversely proportional to the directive influence of the magnetic force act-ing
. A treatise on electrolysis and its applications to therapeutical and surgical treatment in disease . t be taken,allowance being made forthe slight difference between its electromotive force and the volt, (adding 5 ohmsto every 100 in the first instance; subtracting 2 ohms in the second.) 268 ELECTROLYSIS. In the year 1870 1875 1880 In Zurich Dublin Turin Vienna Koenigsberg The angle produced by a given current on a given galvanometer beinginversely proportional to the directive influence of the magnetic force act-ing on the needle, it is obvious that the indication of a galvanometergraduated in London, for instance, would be excessive when used inTurin or Vienna, (in the proportion of 182 to 211 and 209 respectively),deficient when used in Edinburg or Dublin, (in the proportion of 182 to166 and 171 respectively). It will be noticed that the magnetic intensitygoes on increasing as one goes eastwards and southwards from London. This absolute galvanometer referred to by De Watteville is devisedby Gaiffe of Fig. 50.— B, box containing the apparatus; D,D, metallic circle which connects the galvano-meter with the battery, and which can be circled on its axis so that the needle will be outside of thecoil and point at the O0 when at rest; H, multiplied coil which is placed underneath in the smallersize of the instrument which is attached to the portable battery. Instead of placing the magnetic needle on a horizontal plane, it is oftenplaced in a vertical line, and the coils correspondingly in the same axis;but, in this form of arrangement the needle should always be magnetizedwith the same intensity, and which it is obviously impossible to do, as MEASUREMENT <»F CURRENTS OF ELECTRICITY. 2G9 magnets lose their maximum intensity From constanl use or from theirproximity to other magnetio influences. These vertical needles are doIliable to the variations which are due to their geographica
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