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Show WONDERFUL SALT PRISMS MADE IN AMERICA In an article on John Brashear, astronomer as-tronomer and Instrument maker, In tho July American Magazine, Merle Crowcll says; "In the early eighties, Langley was Immersed In his significant studies of the heat rays of tho Bun thoso rays I hat make organic life possible on tho earth. Now these rays do i.ot pass readily through glass, but they do pass through rock salt. Mr. Wangle had to have his prisms nnd , tenses of rait mudo In Paris, :iml taken back Micro for polishing 'as soon as they became moistend. As it lesult tho prisms were on tho high 8Fos most of tho time, nnd tho distinguished dis-tinguished American astronomer was getting desperate. For tho secret of making these prisms was bottled up In Purls. I "Can you duplicate tho work of these French masters? Langley ask-ocl ask-ocl Brashear ono day. "I'll try, said Brashear. "And try ho did, week after week, , method utter method. Ono morning, os he lny in bed at four o'clock, pon- I dorlng tho problems Involved, n so- llutlou came to him. He rushed to his chip, tried out his plan and found It worked. Soon Brashear was far 3ur-passing, 3ur-passing, both In accuracy and size, anything that ever enmo out of Par-Is Par-Is - "Tho largest salt prisms constructed construct-ed prior to this lvail been two Inches mi each sldo; ho Irrnn mnklng ilvo and ono hnlf Inch prisms." |
