The American journal of the medical sciences (1827)
[Thorofare, N.J., etc.] Charles B. Slack [etc.] · leaf 454
2". The mechanism for adjustment allows the rotation of the quadrant around the bar as a fixed point. In its rotation it moves over a graduated circle at k, in its course describing a hemisphere, the pole of which would be the fixed point upon the axis of rotation. The meridian of the sphere at… … 270 The hemisphere and circles described by the perimeter are represented in Fig. 4. The concentric circles serve to show the imaginary lines drawn
Medicine
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
