The London, Edinburgh and Dublin philosophical magazine and journal of science . zation,but to dielectric effects. If this were the case it was thoughtthat the subject would be well worth further investigation. Description of Apparatus. In carrying out the present investigation it was decided,after some preliminary experiments, not to use glass separatorsbetween the plates, for being small they were troublesome towork with, and also necessitated the removal of the upper plateand disturbance of the liquid when it was required to changethe thickness of the layer. It was therefore resolved to att
The London, Edinburgh and Dublin philosophical magazine and journal of science . zation,but to dielectric effects. If this were the case it was thoughtthat the subject would be well worth further investigation. Description of Apparatus. In carrying out the present investigation it was decided,after some preliminary experiments, not to use glass separatorsbetween the plates, for being small they were troublesome towork with, and also necessitated the removal of the upper plateand disturbance of the liquid when it was required to changethe thickness of the layer. It was therefore resolved to attachthe upper plate to a vertical screw, and a piece of apparatuswas found in the laboratory which, it was thought, would T 2 256 Mr. G. B. Bryan on the Determination of answer the purpose very well. It is shown in fig. 1. Themicrometer-screw S carries two parallel brass plates ph p2;px is fixed at right angles to the screw, and p2 attached to piby three adjusting screws s^^i round the p2 is suspended the upper electrode A, by means of aglass rod gY. Fig. Diagram of First Form of Apparatus. \ rat. size. To the iron base-plate P is attached a vertical glass rod g2,which carries two brass plates p5l p± connected together byadjusting screws s2s2s2 similarly to the plates ply p2. p3 isanother brass plate connected to p4 by the glass rod g3, and onthis plate is placed the glass vessel V which contains thelower electrode B, resting on three glass points. The glassvessel is covered by an ebonite plate T which fits loosely the Conductivity of Liquids in Thin Layers. 257 round the glass rod g±. The lead wire, b, from the lowerplate is brought up through a thin glass tube. The micrometer-screw has 20 threads to the inch, andpasses through a very long nut; and as it carries a consider-able weight there is no backlash. The micrometer head isdivided into 100 parts, so that one division represents 20*00inch. The screw was examined by observing the edge ofthe upper pla
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectscience, bookyear1840
