Ministry of Supply

About: Ministry of Supply is a based out in . It is known for research contribution in the topics: Polarography & Bacillus (shape). The organization has 416 authors who have published 355 publications receiving 8951 citations. The organization is also known as: MoS.

Lens aerials at centimetric wavelengths. A critical survey of the present position

Abstract: The advantages of microwave aerial systems using lenses over those using reflectors are briefly touched upon, various criteria are stated by which the usefulness of a lens aerial may be judged, and a brief study is made, at an introductory level, of the various types of microwave lens currently in use or projected.

Design of packed distillation columns. I. Pressure drop through packed distillation columns

Abstract: Plots of water-rate and packing-shape correction factors for four commonly used sizes of Raschig rings to use with a modified Fanning equation are given. These are for fluid rates commonly associated with distillation, as distinct from absorption. Experimental evidence is given to show the magnitude of the error involved in applying the results obtained with an air/water system to calculations concerning distillation systems.

The recording of optical transients

Abstract: Four methods of recording the transient optical phenomena associated with the spark breakdown of gases are described in the paper. The duration of such transients may vary between the limits 10−3 sec down to 10−8 sec. The consequent problems, limitations and characteristics of the methods are discussed, so that their application to the recording of similar optical phenomena may be appreciated.The first two methods of recording are direct photographic techniques which make use of the Kerr cell and the rotating-mirror camera respectively. The third method described is an indirect one, in which a photo-multiplier tube is used to convert the optical transient to an electrical one; the latter is then displayed on the screen of a high-speed oscillograph and photographed. This method makes use of a sealed off cathode-ray tube which has a 9-cm screen and is operated from a 10-kV supply. The design of the oscillograph and the associated photo-multiplier and amplifier circuits are described and oscillograms are included to illustrate the performance of the equipment. In the latter part of the paper, a recording technique is considered, which is based on the application of television techniques to this work. The principles of the method, which makes use of an iconoscope type of tube, are stated.

Xix.—a microforge attachment for the biological microscope

Abstract: Synopsis The device described enables a standard biological microscope to be adapted to the manufacture of micromanipulator tools. It has most of the features of the de Fonbrune microforge, but costs much less. The design is largely based on de Fonbrune's.