Volume 14, Issue 11, November 1943
Index of content:
14(1943); http://dx.doi.org/10.1063/1.1770094View Description Hide Description
Two charts of reciprocal Lorentz‐polarization factors for equi‐inclination Weissenberg photographs are given, which will furnish simple templates of such factors to be used either directly on the Weissenberg photographs or on the reciprocal lattice nets drawn to an appropriate scale.
14(1943); http://dx.doi.org/10.1063/1.1770095View Description Hide Description
The substitution of Newton rings for mechanical contact permits (a) locating the setting reliably within ±0.0002 mm and (b) elimination of errors due to weight of lens since the optical setting can be achieved before mechanical contact. Guild's original instrument is described; also a new model recently constructed.
14(1943); http://dx.doi.org/10.1063/1.1770096View Description Hide Description
By using an electron gun, one can effect a great reduction in the contamination of the target by material evaporated from the filament, and can prevent space charge from limiting the target currents available at low voltages. An arrangement which has proved satisfactory is described.