This newsletter, authored by Keith Watson, provides details about coronagraph observations for the month of April 1963. Highlights include: the spectrograph focus tests from last month were reduced and the results a bit surprising, the image tube remains away from Climax with number 1 at Mt. Wils... Show moreThis newsletter, authored by Keith Watson, provides details about coronagraph observations for the month of April 1963. Highlights include: the spectrograph focus tests from last month were reduced and the results a bit surprising, the image tube remains away from Climax with number 1 at Mt. Wilson, California and number 2 not completed in Boulder, problems with control over exposures on the flare patrol, more work was done on the coronameter on the correcting circuit and a new Sanborn recorder was installed, continued photographs taken with the 16" coronagraph and Halle filter, and there was a big turn out for the Snow-off Contest. Show less