A simple arrangement for measuring sound absorption at low frequencies D. H. BekkeringC. W. Kosten OriginalPaper Pages: 205 - 212
A sensitive apparatus for qualitative testing of crystals on piezoelectricity W. G. PerdokH. Van Suchtelen OriginalPaper Pages: 195 - 204
Studies of silicon carbides with the electron microscope E. De HaasD. Lundqvist OriginalPaper Pages: 181 - 186
A powerful light source for the illumination of wilson cloud chambers N. Warmoltz OriginalPaper Pages: 139 - 142
Some remarks on the dispersion of the ferromagnetic permeability H. J. Van Leeuwen OriginalPaper Pages: 135 - 138
An adjustable curved crystal monochromator for X-ray diffraction analysis P. M. De Wolff OriginalPaper Pages: 119 - 126
The virtual cathode problem for cylindrical electrodes A. Van Der Ziel OriginalPaper Pages: 105 - 118
Current distribution in triodes neglecting space charge and initial velocities H. C. Hamaker OriginalPaper Pages: 77 - 104
Optical impedance and surface coating R. KronigB. S. BlaisseJ. J. v. d. Sande OriginalPaper Pages: 63 - 76
On a cavity resonator of high quality for the fundamental frequency K. F. Niessen OriginalPaper Pages: 18 - 34
Numerical computation of the constants of magnetic electron lenses M. v. MentsJ. B. Le Poole OriginalPaper Pages: 3 - 17
