Characteristics of striæ in optical glass . PRICE 5 CENTS Sold only by the Superintendent of Docvunents, Government Printing Office Washington, D. C. WASHINGTON GOVERNMENT PRINTING OFFICE 1920 CHARACTERISTICS OF STRI/E IN OPTICAL GLASS By T. T. Smith, A. H. Bennett, andG. E. Merritt CONTENTS Page I. Appearance and effects of striae 75 1. Detection of striae 76 2. Projection of striae 78 3. Characteristic striae 81 4. Striae and definition 82 II. Index of refraction 87 III. Summary and conclusions 91 I. APPEARANCE AND EFFECTS OF STRI^ In the manufacture of optical glass one of the difficult req
Characteristics of striæ in optical glass . PRICE 5 CENTS Sold only by the Superintendent of Docvunents, Government Printing Office Washington, D. C. WASHINGTON GOVERNMENT PRINTING OFFICE 1920 CHARACTERISTICS OF STRI/E IN OPTICAL GLASS By T. T. Smith, A. H. Bennett, andG. E. Merritt CONTENTS Page I. Appearance and effects of striae 75 1. Detection of striae 76 2. Projection of striae 78 3. Characteristic striae 81 4. Striae and definition 82 II. Index of refraction 87 III. Summary and conclusions 91 I. APPEARANCE AND EFFECTS OF STRI^ In the manufacture of optical glass one of the difficult require-ments, perhaps the most difficult that the manufacturer hasto meet, is that the glass shall be homogeneous. Glass whichcharacteristicso16759unse
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Keywords: ., bookcentury1900, bookdecade1920, bookidcharacterist, bookyear1920
