Additional Formats
Baum Double Achromat
You might also be interested in
Image not available
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
Image not available
William Alvin BAUM [8]
Additional Formats
[Incl c.ltr WAB to MATuve; c.ltr WAB to JSHall]
Bowen
Image not available
William Alvin BAUM [36]
Additional Formats
[Mainly re Image Converter Conference @ Pasadena, Nov '59 --ltrs to participants in conference such as WAHiltner; JSHall; ALallemand]
Bowen