From Gil Gandenberger's collection
1130. An early ophthalmic refraction machine, with the horizontal piece being used to measure the degree of presbyopia (difficulty focusing close because of age-related loss of lens compliance). The strip in the rotating part is for various strengths of cylindrical lenses.
A close-up of one of the small parts on the lower left of this photo can be seen here.
1131. Tiling spade, missing its 48" handle, used when digging trenches, the advantage to using it is that wet soil doesn't stick to it as when using a regular shovel.
1132. Crate opener/nail puller, marked "The Lynoch".
1133. A piece of exercise equipment, to use: stand on a round plate, hold the handles tight with both hands, and turn the waist left and right.
Larger image
1134. DeCap ReCap Tool used to remove Berdan primers from brass shotshells:
1135. Otis King slide rule:
To submit photos, click on the profile link at the upper right to find my email address.
Last week's set is seen below, click here to view the entire post:
Black Ops Pro Tips
More discussion and comments on these photos can be found at the newsgroup rec.puzzles.
