31 Aug: A long-since-forgotten method once used almost exclusively to record the wing configuration of birds in flight. With today's faster photographic (and Xray) equipment, it's not used much anymore, but I thought you might appreciate this glimpse into the past. BTW, that is Jim's window, definitely NOT mine; before you chastise Jim, inspect yours with the sun hitting it at a steep angle.
31 Aug: A long-since-forgotten method once used almost exclusively to record the wing configuration of birds in flight. With today's faster photographic (and Xray) equipment, it's not used much anymore, but I thought you might appreciate this glimpse into the past. BTW, that is Jim's window, definitely NOT mine; before you chastise Jim, inspect yours with the sun hitting it at a steep angle.