8A
ANALYTICAL
CHEMISTRY
Aluminum SMOKE RINGS.
Λ diffraction pattern of metallic aluminum by
Type EMD-2 complete with optical system, power supplies, vacuum system, and control panel. Features include: choice of optics to suit application; 5-control specimen positioning; ports for accessories; built-in charge neutralize!·; antîhalation beam s t o p ; direct-viewing fluorescent screen; built-in 3-plate camera (4" χ 5"); multiple specimen holders; high - speed electromechanical valving.
the RCA Electron Diffraction Unit, Type ΕMD-2! I HIS pattern reveals fundamental facts about the crystalline structure of an ultrathin film of aluminum. T h e pattern was produced in an RCA Electron Diffraction Unit by bombarding the specimen with a beam of electrons—then capturing the diffraction pattern with a camera built right into the unit itself! This instrument is unsurpassed for pro ducing reflection and transmission dif RCA
Micro-second limer Vacuum Un!»
fraction patterns from micro-quantities of materials, surfaces, and monomolecular layers. Type EMD-2 makes it possible to distinguish between structures, o r forms of materials, which have t h e same chemical composition but differ physi cally. In a matter of seconds it can produce clear, brilliant patterns of matter present in quantities t o o minute for X-ray dif fraction. / / is the only means known for
SCIENTIFIC
INSTRUMENTS
Vacuum Goge Count-Rate Meter
SCIENTIFIC
FOR
examining the atomic structure of true surfaces. Type EMD-2 is effective in w o r k with metals, ceramics, plastics, organic films, biologicals, etc. Its usefulness for inves tigating corrosion, catalysts, lubricants, surface deposits, graphites, and pigments is well established. For complete data, write Dept. 1 I X , RCA Engineering Products, Camden, N . J.
INDUSTRY
ν-ι»—.. Table Model JS^VoMoge Electron Micrescopi» ' " W S»M>lr
Vacuum;teeï-Î;v„***eorf*i Μ β * * Ά leeajoi Electron Microscope
INSTRUMENTS
RADIO CORPORATION of AMERICA ENGINEERING
PRODUCTS
DEPARTMENT, CAMDEN, N.J.
In Canada: R C A VICTOR Company Limited, Montreal
