Numerical computation of the constants of magnetic electron lenses M. v. MentsJ. B. Le Poole OriginalPaper Pages: 3 - 17
On a cavity resonator of high quality for the fundamental frequency K. F. Niessen OriginalPaper Pages: 18 - 34
Optical impedance and surface coating R. KronigB. S. BlaisseJ. J. v. d. Sande OriginalPaper Pages: 63 - 76
Current distribution in triodes neglecting space charge and initial velocities H. C. Hamaker OriginalPaper Pages: 77 - 104
The virtual cathode problem for cylindrical electrodes A. Van Der Ziel OriginalPaper Pages: 105 - 118
An adjustable curved crystal monochromator for X-ray diffraction analysis P. M. De Wolff OriginalPaper Pages: 119 - 126
Some remarks on the dispersion of the ferromagnetic permeability H. J. Van Leeuwen OriginalPaper Pages: 135 - 138
A powerful light source for the illumination of wilson cloud chambers N. Warmoltz OriginalPaper Pages: 139 - 142
Studies of silicon carbides with the electron microscope E. De HaasD. Lundqvist OriginalPaper Pages: 181 - 186
A sensitive apparatus for qualitative testing of crystals on piezoelectricity W. G. PerdokH. Van Suchtelen OriginalPaper Pages: 195 - 204
A simple arrangement for measuring sound absorption at low frequencies D. H. BekkeringC. W. Kosten OriginalPaper Pages: 205 - 212
On criteria for the permissible non-linear distortion of amplifiers V. F. SchutC. W. Kosten OriginalPaper Pages: 261 - 267
The design of an electromagnet with rectangular pole pieces J. Kistemaker OriginalPaper Pages: 268 - 272
Calculation of spark breakdown voltages in air at atmospheric pressure A. Pedersen OriginalPaper Pages: 299 - 305
Some practical applications of a precision alignment method A. C. S. Van Heel OriginalPaper Pages: 306 - 324
On avoiding low frequencies in a rectangular cavity resonator used as part of a triode generator K. F. Niessen OriginalPaper Pages: 325 - 340
A new double-websky-signal for two-circle optical goniometers W. G. Perdok OriginalPaper Pages: 391 - 396
Static and transient statistics in telephone-traffic problems J. Giltay OriginalPaper Pages: 413 - 419
A new crystalcut for quartz with zero temperature coefficient E. J. Post OriginalPaper Pages: 420 - 428
On the determination of the complex permeability of ferromagnetic conductors at high frequencies A. Wieberdink OriginalPaper Pages: 439 - 452
Whiteness relations and their applications H. J. SellingL. F. C. Friele OriginalPaper Pages: 453 - 476