. Rational therapy . dby a glass bulb from air currents and moisture, serves to ascertainwhether a certain substance contains positive or negative elec-tricity. It is charged by bringing the substance in question incontact with the wire of the instrument, causing the gold leaves ele;ctrothi;rapy 199 to diverge at once. The charge is then tested with an electrifiedglass rod. If the electroscope contains positive electricity, theleaves will diverge still more and if it contains negative elec-tricity, they will collapse. All substances may be electrified byfriction, and all conduct electricity, s
. Rational therapy . dby a glass bulb from air currents and moisture, serves to ascertainwhether a certain substance contains positive or negative elec-tricity. It is charged by bringing the substance in question incontact with the wire of the instrument, causing the gold leaves ele;ctrothi;rapy 199 to diverge at once. The charge is then tested with an electrifiedglass rod. If the electroscope contains positive electricity, theleaves will diverge still more and if it contains negative elec-tricity, they will collapse. All substances may be electrified byfriction, and all conduct electricity, some more, some less. Themetals and their solutions are good conductors. Silk, sealingwax, dry skin and similar substances, are bad conductors and arecalled insulators. If a charged substance is brought near anuncharged body it induces equal and opposite charges on its sidesor ends. For instance—an isolated positively charg-ed bodybrought near an isolated metal cylinder causes negative electricityon the further
Size: 1174px × 2128px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjecttherapeutics, bookyea
