2428.     NEIL, D. J.  Sheet Specimen Scanner for X-Ray Diffraction.  Canadian Jour. Tech., vol. 29, No. 2, 1951, pp. 84-86.

        An improved and simple design is described and illustrated.  Simultaneous back reflection and transmission photographs at distances of 3 and 5 cm., respectively, and at any glancing angle from 0 to 90 are possible.  The area scanned is approximately 2 cm.2 at rates of either 2 cm.3/hr. or 4 cm.2/ hr.  Useful exposures can be obtained with exposure times as low as 10 min.