And what country can preserve its liberties if their rulers are not warned from time to time that their people preserve the spirit of resistance? Let them take arms. The remedy is to set them right as to facts, pardon and pacify them. What signify a few lives lost in a century or two? The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants.
Saturday, February 10, 2024
Double-Slide Plate Holder on the 40-inch Refractor Telescope Yerkes Observatory, Williams Bay, Wisconsin. The Observatory was operated by the University of Chicago Department of Astronomy and Astrophysics
^^ Micro Adjustments for focusing select images across the field of view (think - 'focus points' in a camera's autofocus) to an eyepiece or, in this case, the film plate holder.
Just down the road from here….
ReplyDeleteWhat do all the smaller wheels do for the telescope?
ReplyDeleteHeltau
^^ Micro Adjustments for focusing select images across the field of view (think - 'focus points' in a camera's autofocus) to an eyepiece or, in this case, the film plate holder.
ReplyDeleteOtherwise known as Lake Geneva. Very close to the old Playboy Club and airport, circa 1965ish.
ReplyDelete