Direct Reading Frequency Response Slide Rule (servo frequency response)
Boonshaft and Fuchs Inc.
Frequency Response Slide Rule
19 x 18 x 2 in. (case open)
A very fancy slide rule or nomograph consisting of a large plastic holder inco which 11 (or 25 possible) white plastic slide will fit. Comes in a fine leather case containing the slide holder, a large cursor that fits over the holder, 25 white slides, and a special cleaning brush to make sure the interior of the holder is kept free of dust and dirt.