FINE GRINDING

Series: Optical craftsmanship series

Duration: 15 min

Year Published: 1943

Creator: Castle Films

Format: 16mm

Sound: Sound

Description: Produced by US Office of education. Large blocked concave lenses subjected to a No. 1500 and 1600 abrasive on grinding machine, to accuracy beyond mechanical measurement. Adjustment of grinding machine, inspection for defects. Prime need for cleanliness.

Complete Record: Series: Optical craftsmanship series Dewey number: 681.4 Audience level: sh-c-trade-adult Guide Format/cost: 16-sd-$22.58 Distributors / rental: Bell & Howell Company $1.50; Calhoun Company; Dav; Films, Inc; Wilfred Naylor; A. H. Rice and Company; Sunray Films Company; Visual Education, Inc (Texas); Visual Art Films $22.58; Visual Education Service, Inc

Metadata Source:Educational Film Guide 1946