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Discussion and analysis of data on the first reannealing
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A. Q. Tool annealed pressed annealing furnace annealing range apochromat approximately average index barium flint glass birefringence blank deviations blanks of group C. G. Eichlin C. G. Peters chemical composition chemical heterogeneity constant temperature prism cooling correspond E. E. Hill effective annealing temperature effective treating temperature F Average furnace gradients geneity glass path Glass Tech group averages heat history higher effective treating holding period index deviation index measurements index of refraction INDEX VARIATIONS individual blanks Interblank differences intrablank homogeneity intrablank variation intramelt spreads iron disk isotherm L. W. Tilton lens blanks linear separations lines magnitude maximum melts optical density optical glass optical heterogeneity optical surfaces peripheral portion Peters and C. H. previously probable errors Rayleigh reanneal the blanks refractive index respect reversal in sign second reannealing sine curve small prism spacers Table thermal expansion three blanks Tool and C. G. uniform various blanks wave lengths