Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 99
ms that would be wasted above in a horizontal or down-ward direction, and from this reflector two rows of prisms aresuspended. One half of the prisms are arranged with their flatside to the light, and the other half have their angular sidetoward the light. Below the focus is a bowl shaped… … Fig. 42. STREET ILLUMINATING BY ELECTRICITY. 85 shaped and quite large. Thus modified, the light can be lookedat with perfect ease, while its brilliancy does not seem to be atall impaired, the ground glass portion of the globe only beingbetween the eye and the luminous point. The prisms and…
Electrical engineering
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