NEW BOOKS for distribution. The materials are classified into groups according to the purposes for which they are intended and the kind of certification, if any, that applies to them. Summarized tables of analyses are also given to in dicate the type of standards of com position currently available. A sched ule of fees and weights, as well as di rections for ordering, are included. S p e c t r o g r a p h s Analysis for Selected M i n o r Elements in P i e r r e S h a l e .
The development of a high tempera ture gas chromatograph is described. Temperature operation can be iso thermal or linearly programmed. The novel integrated, stainless steel column is heated by the passage of electric cur rents (up to 120 amp.) and the sensi tive detector uses hydrogen flame ion ization. Tables Part
of I.
Spectral-Line Intensities. A r r a n g e d b y Elements.
National Bureau of Standards Mono
graph 32. Part I. W. F. Meggers, C. H. Corliss, and B. F. Scribner. 473 pages. 1961. $4.00. This monograph gives in tabular form, for 70 elements, the intensity, character, wavelength, spectrum, and energy levels of 39,000 lines between 2000 and 9000 A. The relative intensi ties or radiant powers were observed in a series of copper arcs each contain ing 0.1 atomic % of an element. The experimental errors are 20% on the
Paul R. Barnett. Geological Survey Professional Paper 391-B. 10 pages. 1961. 20 cents. Spectrographs determinations made on 80 samples of Pierre shale (Late Cretaceous) for 10 elements are de scribed. The elements determined were boron, barium, cobalt, chromium, gal lium, nickel, scandium, strontium, ti tanium, and zirconium. The paper also lists a comparison of the results by chemical and spectrographic determina tions in terms of the coefficients of variation. Chemical Analysis f o r Selected M i n o r E l e m e n t s in P i e r r e S h a l e . L. F.
Rader and F. S. Grimaldi. Geologi cal Survey Professional Paper 391-A. 45 pages. 1961. Jfi cents. This paper reports the results of a study of the analytical precision of chemical methods for the determination of selected minor elements in Pierre shale. Detailed procedures are given for the determination of titanium, va nadium, chromium, manganese, cobalt, nickel, uranium, carbonate carbon, total carbon, and organic matter. Graphic comparisons are made of determina tions by different chemists to indicate either the agreement or the bias of results. The paper includes 55 tables and 19 illustrations. A
Primary
Ultrasonic
Standard.
AD 268 303. S. T. Boghosian and J. W. Orner, Watertown Arsenal. 17 pages. December 1961. 50 cents. This is a report on studies to estab lish ultrasonic standards to be used in the determination of ultrasonic instru ment sensitivity and inspection specifi cations. The steel ball vibration method is used in immersion testing. The Development of α High Tem perature (1GOO C.) Gas Chroma tograph. AD 268 700. C. B. Easton and A. J. Martin, F & M Scientific Corp. for Aeronautical Systems Divi sion, U. S. Air Force. 21 pages. June 1961. 75 cents.
SCIENTIFIC INSTRUMENTS FOR RESEARCH, PRODUCTION, ENGINEERING SINCE 1856
Atomic Absorption Equipment Auto-Collimators Clinometers Crystals, Synthetic Diffractometers Digitizers (Optical, Mechanical) Etalons Goniometers Hollow Cathode Lamps and other Light Sources Interferometers Measuring Microscopes Microwave Components Microphotometers Microptic Levels Monochromators Optics (Prisms, Lenses, Flats, Polygons) Photoconductive Cells Polarimeters Refractometers Seismometers Spectrographs Spectrometers Theodolites Thermopiles X-ray Equipment
For α complete listing of major Hilger & Watts instrumentation, ask for Catalog Sheet 260
HILGER & WATTS, INC. 431 S. DEARBORN ST. C H I C A G O 5, ILLINOIS
Sales, Service, Parts, by
ENGIS EQUIPMENT COMPANY C H I C A G O 5, ILL. Exclusive Distributor for the United States
Circle No. 151 on Readers' Service Card VOL. 34, NO. 7, JUNE 1 962
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