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Mirror Grinding in the Kitchen, Roger Hayward's Foucault Tester, Mirror Making Instructional Films

Mirror Grinding in the Kitchen, Roger Hayward's Foucault Tester, Mirror Making Instructional Films

MANY WOULD-BE AMATEUR TELESCOPE makers forego the sport of mirror making because they have no place to set up the conventional mirror-grinding pedestal. This, however, need not be an obstacle; mirrors have been ground on tables, in bathrooms, in jail, and even in a morgue on a marble slab between two corpses.

David P. Barcroft of Madera, Calif., has improvised from dime-store pans adequate equipment for grinding and polishing a mirror on a bench or almost anywhere. The drawings at the left in the illustration on the left contain an exploded view of the parts above the assembled dingbat. Barcroft attached the square baking pan to the bench with four blobs of pitch. He pitched the tool to a block of wood, centered this block in a common pie pan, poured plaster of Paris around it to half the depth of the pan and allowed it to set.

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Mirror Grinding in the Kitchen, Roger Hayward's Foucault Tester, Mirror Making Instructional Films
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