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📜 SIMILAR VOLUMES
The miniature refrigerators presented here at the latest offshoots of the Philips family of Stifling-cycle machines. They are an alternative to the classical liquid gas cryostats, and are specially attractive for cooling purposes outside the laboratory. Their main application is at present in the co
## CURRENT TOelCS 517 sensitive to the wavelengths of light given off by ordinary incandescent light bulbs, and is well suited to operate with these easily available sources with good fidelity. Another virtue is the device's low impedance. Rollosprayer.--Chemical control of weeds in turf has been
A new and manufacturable miniature electron beam column has been designed, fabricated and tested. The low-voltage, all electrostatic, microfabricated electron beam column includes lenses consisting of bonded stacks of micro-machined silicon and glass. The lenses are microfabricated on 150 mm diamete
Prototype low-noise miniature accelerometers have been fabricated with electron-tunneling transducers. The electron-tunneling transducer permits detection of small displacements of the proof mass with high electrical response; such a transducer is essential for a high-performance miniature accelerom