Additional Formats
Solid Block Cassegrain Schmidt
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Cassegrain Schmidt [#1]
Additional Formats
[Incl c.ltr WABaum to Don E. Davidson; c.4 ltrs ISB to WABaum; ltr WABaum to ISB]
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Cassegrain-Schmidt Image Tube Camera [#2]
Additional Formats
[Incl c.ltr ISB to WABaum]
Bowen
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Cassegrain-Schmidt Image Tube Camera [#1]
Additional Formats
[Incl c.bids for camera; c.ltr Arthur A. Hoag to ISB]
Bowen
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Single Mirror 1:1 Reimaging
Additional Formats
[Incl c.ltr BHRule to Donald A. Loomis {Custom Optics}; c.ltr Henry Mazy {Amersil} to BHRule; c.ltr Robert R. Shannon to BHRule; 3 memos BHRule to ISB; ltr James L. Woods {Perkin-Elmer} to ISB; ltr WABaum to ISB; c.ltr ISB to WABaum; c.ltr R. R. Beyer {Kodak} to WABaum; c.ltr E. Y. Laytty {Corning} to BHRule; ltr Sidney Weiser {Weiser/Robodyne} to ISB; ltr Paul Lee to ISB; c.ltr ISB to PLee]
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Planetary Achromat
Additional Formats
[Incl c.ltr BHRule to Gordon Wares; ltr Robert L. Milkis to ISB; c.ltr WABaum to Max Bray; ltr WABaum to ISB; memo "Preliminary Tests on New Color-Correcting Lens for 24-Inch Lowell Refractor," by WABaum]
Bowen