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Characteristics of striæ in optical glass . FiG. 5.—Strict in slab too close to projection lens for best focus graphic plate, the striae are very faint; but if the image be throwna
![Characteristics of striæ in optical glass . Fig. 14.—Sample of Fig. 13 viewed flatwise use may be seen from the photograph (Fig. 9) of the striae in a six-power binocular, which was Characteristics of striæ in optical glass . Fig. 14.—Sample of Fig. 13 viewed flatwise use may be seen from the photograph (Fig. 9) of the striae in a six-power binocular, which was](https://c8.alamy.com/comp/2AN25NF/characteristics-of-stri-in-optical-glass-fig-14sample-of-fig-13-viewed-flatwise-use-may-be-seen-from-the-photograph-fig-9-of-the-striae-in-a-six-power-binocular-which-was-among-those-submitted-by-the-signalcorps-of-the-united-states-army-to-this-bureau-for-test-thestriae-in-the-left-barrel-of-this-binocular-are-prominent-there-wasan-observable-amount-of-scattered-light-about-the-image-of-anartificial-star-when-an-auxiliary-telescope-was-used-but-withoutsuch-an-aid-the-images-produced-by-both-barrels-were-equally-fig-15a-without-glass-6-c-viewed-flatwise-through-rolled-w-2AN25NF.jpg)
Characteristics of striæ in optical glass . Fig. 14.—Sample of Fig. 13 viewed flatwise use may be seen from the photograph (Fig. 9) of the striae in a six-power binocular, which was
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Characteristics of striæ in optical glass . FiG. 5.—Strict in slab too close to projection lens for best focus graphic plate, the striae are very faint; but if the image be throwna
Effect of hydroxyl concentration on Yb3+ luminescence properties in a peraluminous lithium-alumino-silicate glass
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