Back Matter Source: The Scientific Monthly, Vol. 67, No. 5 (Nov., 1948), pp. ix-xii Published by: American Association for the Advancement of Science Stable URL: http://www.jstor.org/stable/22307 . Accessed: 01/05/2014 21:09 Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at . http://www.jstor.org/page/info/about/policies/terms.jsp . JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact [email protected]. . American Association for the Advancement of Science is collaborating with JSTOR to digitize, preserve and extend access to The Scientific Monthly. http://www.jstor.org This content downloaded from 62.122.73.181 on Thu, 1 May 2014 21:09:27 PM All use subject to JSTOR Terms and Conditions
Transcript
Back MatterSource: The Scientific Monthly, Vol. 67, No. 5 (Nov., 1948), pp. ix-xiiPublished by: American Association for the Advancement of ScienceStable URL: http://www.jstor.org/stable/22307 .
Accessed: 01/05/2014 21:09
Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at .http://www.jstor.org/page/info/about/policies/terms.jsp
.JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range ofcontent in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new formsof scholarship. For more information about JSTOR, please contact [email protected].
.
American Association for the Advancement of Science is collaborating with JSTOR to digitize, preserve andextend access to The Scientific Monthly.
http://www.jstor.org
This content downloaded from 62.122.73.181 on Thu, 1 May 2014 21:09:27 PMAll use subject to JSTOR Terms and Conditions
COLLEGE PHYSICS By JOHN C. ALBRIGHT, Rhode Island State College
This text, designed for the course in general physics offers a more extensive treatment than that commonly presented in the usual textbook. The fundamentals of the subject, as developed in classical physics, are expressed in a clear, thoroughly teachable manner. Subject matter is presented in the order of mechanics, heat, wave motion and sound, electricity and magneticism, and optics. 735 pages, $4.50
PHYSICS TELLS WHY By OVERTON LUHR, late of Union College
A simply written, interesting book, taking up the basic principles underlying such sub- jects as Radar, Stratosphere, Aviation, Ballistics, Television, and Polarization. It will be found to be of especial value as a textbook in classes where the aim is to present an easily understandable picture of the part physics plays in our daily lives. Numerous illustrations have been used throughout the work to elucidate the important physical laws. 387 pages, $3.75
RUDIMENTS OF CHEMISTRY By ROLAND M. WHITTAKER, Queens College
This beginning text in college chemistry is especially designed for the nonmajor course and the science survey course. The aim of the organization of the whole book has been to present adequate material in such fashion as will make generally clear to the student those theories that serve present-day chemists for explaining the nature, properties, and behavior of matter in its several forms. 310 pages, $3.00
PRINCIPLES OF PHYSICAL GEOLOGY By ARTHUR HOLMES, University of Edinburgh
A text for beginning courses in general geology on the college level. The method of treatment adopted is one that twenty years' experience has shown to be successful in training students, in holding and developing their interest. The great discoveries anid achievements of the past are described in addition to the many spectacular dis- coveries made possible by modern methods of investigation. 532 pages, $4.50
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This super-powerful 1 Y2-ton, 28,000-watt electro- magnet, developed by Dr. J. E. Goldman of Westinghoose Research Laboratories, is oil-cooled., wound with 6,000 torus of square copper wire.
Manet "cPicks Pockets" Two Fe'et -Away Enough strength is packed between the poles of this new electromagnet to sup- port a 4,000-pound automobile. It will pick the pockets of the operator stand- ing two feet away and stop his watch at four feet.
One secret behind. this magnet's extra power is the special alloy in the pole tips. It was developed by the Westinghouse research laboratories, and gives more mag- netic energy than ordinary iron.
But more important, it opens doors to
new studies in magnetism and its prac- tical applications-for example: in design- ing cyclotrons; in the production of smaller and lighter aircraft instruments; and as a research tool for studying the relationship between the crystal line structure of metals and their magnetic properties.
No matter what immediate results accrue from this new electromagnet, Westinghouse research engineers will con- tinue to look for ways to help industry and science move ahead. G-10022.
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A considerable fraction of the Symposium Volumes and Research Conferences piblished. by the AAAS have been exhausted by orders not only from libraries and from speeialists in their respective fields, but also from foreigni libraries and scientists. The titles remain- ing in print are shown below with prices. X
Two new volumes are, "Approaches to Tumor Chemotherapy", a compreheiisive disenis- sion by more than 60 participants, and " The Rickettsial Diseases of M\[ain ", a suirvev of an important group of serious infectious diseases which have recently become important health problems.
Prices Check Volumes Non-
Desired Title Members members D Tuberculosis and Leprosy ... $2.50 $3.00 []The Migration and Conservation of Salmon .2.00 2.50 D Human Malaria ........... .. .. . 4.00 5.00 E] Liebig and After Liebig-A Century of Progress in
Agricultural Chemistry . ..2.50 3.00 D Aerobiology .3.50 4.00 [] Relapsing Fever .2.50 3.00 D Fluorine and Dental Health ..... . 2.50 3.00 L Mammary Tumors in Mice .. ... .... 3.50 4.00 El Dental Caries and Fluorine ...................... 3.00 3.50 a]Approaches to Tumor Chemotherapy ........... . 6.50 7.75 L Rickettsial Diseases of Man ....................... 5.25 6.25
NOTE Special prices are quoted to members as part of their membership privileges because the Association bears all editorial and related costs wlich members pay indirectly in their dues. Moreover, the prices to members are for cash orders that reqiuire no extra billint or accounting. Hence an institution or a nonmember may not place an order on a memn- ber's account, even with the member's consent.
D4| g1g= ___________Analyzes mineralogical specimens by measuring diameters of the con- stituents and accumulating the totals of each. The average of such totals taken after a number of tra-
The slide holder rotates so traverses can verses provides the desired analysis. be made in various directions when ana- Please write for your copy of our litera- lyzing rocks with a decided foliation. A ture and complete operating directions. revolution of each micrometer produces 0.5 mm. horizontal displacement. With 100 divisions on a head, each division produces a displacement of 005 mm. - ., s onC C PAnY
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IELECTRON MICROGRAPHY- to identify and show size-fre-. quency distribution of particles down to 1 millimicron. The pho- tographic material to use is the Kodak Medium Lantern Slide Plate. The electron micrograph shown here is a 15,OOOX enlarge- ment of silica smoke particles. a substance which has recently
g g gg gg ~~~~~~~~~~~become available in commercial quantities. Among the uses for this material-believed to be one of the
g ? ~~~~~~~~~~~~~~~~finest industrial particles-is that of aiding in suspension of other. types of particles in liquids.
2 ULTRAVIOLET MICROGRAPHY II ~~~~~~~~~~~~~~~to study particles down to 7O
millimicrons and to differen- tiate them by their behavior in the ultraviolet. The photographic
.~materials to use are Kodak Metal- 4.lographic Plates or, when images
are weak, Kodak 50 Plates. The ultraviolet micrograph shown here is a 3000X enlargement of leaded
~~~, ~~~zinc oxide particles (at 2750 Angstrom Units). In this case, tiates by showing lead sulfate as
transparent and the zinc oxide as opaque, whereas in visible light, both are transparent.
3 VISIBLE LIGHT MICROGRAPHY-to determine the nature of finely divided particles down to 150 millimicrons. The photographic materials to consider are Kodak Metallographic Plates, with an ideal combination of speed, resolving power, and contrast characteristics; Kodak M Plates, where sensi-
7 ~~~~~tivity to yellow and red light is required; and Kodak Pana- tomic-X Film, when you prefer to work with sheet film. The photomicrograph shown here is a 500X enlargement of com- mercial whiting.
Specific questions on choice of photographic ma-
N N k ~~~terials for problems in identifying'an~d measuring FUNCTIUNAL ~~particles-or in any other branch of scientific or industrial photography-will be fully answered PHOnTOG.RAPHY 1
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