Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 395
glass disk near its peri-phery are secured sixteen radial sector plates of tin foil orthin brass, arranged at equal angular distances apart. Thesesectors are coated on one side with shellac varnish andallowed to dry, when they are placed in position on thevarnished glass disks, varnished side down,… … Sectional Views of Modified Wimshurst Machine. sectors. Brass sectors are preferable on account of theirsuperior wearing qualities. The glass disks are placed on their respective shafts withthe sectors outward. A ring of vulcanite surrounds theglass disks and is grooved internally to receive the…
Physics · Lantern projection · Electric apparatus and appliances
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