. The London, Edinburgh and Dublin philosophical magazine and journal of science. <& & <3 <3 & (® $) \<3 ® <3 0 <% O & Q> G & <® <2? 0 & <Q & <£? O <3 . & & & & 0> & G& 0( currents used in the magnet ranged from 1 ampere to about22 amperes. The current was allowed to flow through themagnet for as short a time as possible, only during the few-seconds required for obtaining the balancing-point on theresistance bridge. To prevent rise of temperature of thepole-pieees, water was arranged to flow along the hollowcores to within a few millimetres of the surfac
. The London, Edinburgh and Dublin philosophical magazine and journal of science. <& & <3 <3 & (® $) \<3 ® <3 0 <% O & Q> G & <® <2? 0 & <Q & <£? O <3 . & & & & 0> & G& 0( currents used in the magnet ranged from 1 ampere to about22 amperes. The current was allowed to flow through themagnet for as short a time as possible, only during the few-seconds required for obtaining the balancing-point on theresistance bridge. To prevent rise of temperature of thepole-pieees, water was arranged to flow along the hollowcores to within a few millimetres of the surfaces of the pole-pieces ; the water was previously passed through a spiraltube which was slightly heated to bring the temperature ofthe water up to that of the room. The strengths of the fields were measured directly aftereach set of readings for the change of resistance. This wasdone by the ballistic method,—the exploring coil beingconnected to a ballistic galvanometer provided with a tele-scope and scale. An arrangement was set up by which theexploring coil could be placed in the same position eachtime between the poles, and by which it could be su
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectscience, bookyear1840
