. How to make and use electricity ... <theelectrophorus will answer all ordinary purposes. It is made inthe following manner: On a circular disk of sheet-iron or tin 8 inches in diameter ce-ment a circular disk of vulcanite 7 inches in diameter. To the center of another circular disk of tin 5 inches in diam-eter, (Fig. 1) apply with heat one end of a stick of sealing-waxfor a handle. Now strike the surface of the vulcanite a fewtimes with a cats fur or a fox-tail; it will become electrifiedwith negative (—) electricity. Then place the tin disk on the 14 HOW TO MAKE AND vulcanite; the negati
. How to make and use electricity ... <theelectrophorus will answer all ordinary purposes. It is made inthe following manner: On a circular disk of sheet-iron or tin 8 inches in diameter ce-ment a circular disk of vulcanite 7 inches in diameter. To the center of another circular disk of tin 5 inches in diam-eter, (Fig. 1) apply with heat one end of a stick of sealing-waxfor a handle. Now strike the surface of the vulcanite a fewtimes with a cats fur or a fox-tail; it will become electrifiedwith negative (—) electricity. Then place the tin disk on the 14 HOW TO MAKE AND vulcanite; the negative electricity of the vulcanite will polarizethe disk, inducing positive (f) electricity on its lower surfaceand — electricity on its upper surface. Now place a finger onthe disk. The — electricity will escape through your bodv tothe earth, but the t electricity will remain on the disk, held bythe — electricity of the vulcanite. Finally, raise the disk by itsinsulating handle. Removed from the influence of the — elec- y—^. 2SF$ *V™ Iulca?lte the f electricity of the disk is now free,£« &.££ »™.? °-n°ne of y°ur naEds (Fig. 2) is brought nearit, a bright spark will pass from it to your hand, and it will be-come discharged. The disk may be charged and discharged in the same man-Se^lt °f timeS WUh0Ut ?**» whipping the vul- «„^£ty£eil- Jar m?l be chargeu* in the same manner a neatnumber of times without recharging the electrophorus Thisapparatus will take the place of a friction machine, and most &™r^^i££*n}i0?edin conne^n with the same maybe performed with the electrophorus. Before taking up current SLhSSSi w?ff 1S °ne T0re amusinS experiment which may beperformed with any instrument Prepare an insulated stool (Pig. 3.) bv placing a souare hoard on four dry and clean glass tumblers used aslies^Let a ver- ™ T-m2 V Zm?% J°;stand on this stoofand lett per-son James, strike John a few times with a cats fur (Borrow orine theTnuX^Ta ZZ moonllg
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectricity, bookyear
