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look... at Farrafld Grating • Efficient • Compact • Precise
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• Rugged • Versatile • Inexpensive
COMPONENTS
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Theoretical residing power of a Farrand Master Diffraction Gratingreflectingike efficiency of Farrand Replicas.
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Farrand Grating Monochromators utilize the famous Farrand grating replicas and associ ated precision optical components . . . result ing in unusually high efficiency, excellent spectral purity and extremely low scatter. A number of models are available to cover var ious spectral ranges from 2 0 0 m/i to 3 0 0 0 ιημ. These Monochromators are ideally suited for a wide range of uses including such applications as microscope illumination, monochromatic projection and spectral measurements.
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535-A So. 5th Avenue Mount Vernon, New York 10SS0 914-668-9393/Cable Address: FOCIUS NY
The Pioneers in Fluorometry Circle No. 25 on Readers' Service Card
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EUCHEM Conference on Nature of the Hydrogen Bond A Euchem Conference on the nature of the hydrogen bond will take place April 10 to 21 at Schloss Elmau near Alittcnwald, German}'. The following topics will be dealt with: structure analysis with x-rays and neutrons; analysis of JNLMlt and ESR spectra; quant um-chemieal calculations; and absorption spectroscopy, particularly in the far infrared. The provisional pro gram and preliminary registration forms may be obtained by writing to Gesellschaft Deutscher Chcmiker, 6 Frankfurt (ΛΙ), Postfach 9075, Ger many.
Symposium on Molecular Structure and Spectroscopy The 22nd annual Symposium on Mo lecular Structure and Spectroscopy will be held at the Dcpt. of Physics, Ohio State University, Sept. 5 to 9. Invited papers planned thus far cover discus sions of the most recently obtained high resolution infrared spectra of planets; experiments currently conducted with lasers; spectroscopy and kinetics; and theory of molecular luminescence. More information on this meeting is available by writing to Professor K. Xarahari Rao, Molecular Spectroscopy Symposium, Dept. of Physics, Ohio State University, 174 West" 18th Ave., Columbus, Ohio 43210.
Experimental N u c l e a r M a g n e t i c Resonance Conference The Eighth Experimental NMR Conference will be held Thursday through Saturday, March 2 to 4 at Mellon Institute,"Pittsburgh, Pa. Ses sions which consist largely of invited papers will lie devoted to recent ad vances in computer-spectrometer inter faces, biological applications, multiple resonance, pulse techniques, oriented molecules, and less-receptive nuclei. For further information contact B. L. Shapiro, Department of Chemistry, Illinois Institute of Technology, Chi cago, 111. 00616.
Industry BETHLEHEM APPARATUS CO., Inc. B A
FRONT AND DEPOT STS. · HELLERTOWN, PA. 18055 Telephone (215) 838-3691 Circle No. 10 on Readers' Service Card
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ANALYTICAL CHEMISTRY
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Chemical Samples Co., 4692 Kenny Rd., Columbus, Ohio 43221, is a new company formed to provide researchers with high-quality specialty chemicals along with physical properties data. Circle No. 43 on Readers' Service Card
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