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MOUNTABLE LABORATORY JACK. 1. (rapid positior|er) . ... Unimac Laboratory Jack design permits ... in a mass spectrum plus an indication of how each su...
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POSITIVE POSITIONING RACK M O U N T A B L E MULTIPURPOSE

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Unimac Laboratory Jack design permits instant action through entire travel range —effortless, smooth, easy control. Positive locking for safe, secure support of lab equipment. Mountable on all standard lab racks and stands. Extremely versatile; can be utilized wherever rapid positioning of lab equipment is desired. The Unimac Lab Jack is unique in its adaptability, by means of various adjustments and acces­ Model U121 sories, for use in raising and lowering Mountable equipment into constant temperature Laboratory baths, etc. The use of accessory rods in Jack combination with the Unimac Universal $38.00 Support Clamp and accessories permits the assem­ bly of multistage lab jack systems as well as hori­ zontal positioning of equipment. Contact your near­ est lab Supply Dealer. Or write Dept. D-2.

MASS SPECTRAL CORRELATIONS by FRED W. McLAFFERTY, Dow Chemical Company This compilation gives the empirical and structural formulas of ions that might be found at a particular m/e in a mass spectrum plus an indication of how each such

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The author has drawn freely from his extensive back­ ground in mass spectrometry as well as from the efforts and ideas of colleagues and co-workers. You can find possible ion structures and precursor molecules for each of the prominent ions in the mass spectrum of an unknown compound with a further indication of the general probability of their occurrence. Newcomers to the field will find this book indispensa­ ble.

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