Back Matter Source: The Scientific Monthly, Vol. 30, No. 3 (Mar., 1930), pp. ix-xvi Published by: American Association for the Advancement of Science Stable URL: http://www.jstor.org/stable/14764 . Accessed: 01/05/2014 23:54 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 130.132.123.28 on Thu, 1 May 2014 23:54:47 PM All use subject to JSTOR Terms and Conditions
Transcript
Back MatterSource: The Scientific Monthly, Vol. 30, No. 3 (Mar., 1930), pp. ix-xviPublished by: American Association for the Advancement of ScienceStable URL: http://www.jstor.org/stable/14764 .
Accessed: 01/05/2014 23:54
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
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HE scientist will be intensely interested in a 100 _/inew microscope perfected and just intro-
duced by the Bausch & Lomb Optical Company
particularly for use in his research work. The "turned-about" position, a decided change in design, suggested by Dr. L. W. Sharp of Cornell -University, makes it possible for the operator to work with all parts in full view.
To achieve the ultimate in comfort, convenience, time-saving and efficiency the B & L Engineering Staff have been doing intensive research and experi- mentation for a period extending well over a year.
This microscope, for the research worker, is ideal, being characterized by the minimum of effort and the maximum of comfort for continued observations over long periods of time.
A neW lamp has been designed especially for use with this new Re. search Microscope. It utilizes the full aperture of the microscope con- denser (up to N.A. 1.40) and transmits sufficient light for critical illumina- tion of the specimen under observation. The intensity of illumination may be varied by usie of four neutral-tint filters. For white light effect, a Daylite Glass is furnished. A water-cell is necessary when using Wratten "M" filters for contrast and for photography, and may be had with the instrument.
IVI
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MOST women ar e for r yourself and the surprised when children, curtains and,
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| NICHOLAS HAZ, F. R. P. S. Photographs the Mirrored Refledtion of Himself
with the Remarkable LEICA" Camera
Could you do this with your Camera?
-What Mr. Hadz writes: "1Your Leica is a marvel- ously uiseful little camera. For modern effects, freakish angles, night scenes, stage work during the performance, portraits in the dressing rooms with just a f ew regu- lar Mazda bulbs this camera is very well adapted."
"Composite pictures, super- Photograph from a ~~~~~~imposed exposures are very Mirror-Lens at F. ~~~~~~~~easy to make, and while it is
3.5-1 /20 Sec. Arti- true that the ordinary small ca Light. R.NC LSH ,clrtd h- L dcp,ptcamera has to be handled by fical Ligrapher, PaneradIlutrtrdi- ormestis a good photographer to get
good results, the Leea is so l vorsatilit of the amous Leica Camera.The 12"x 18" lose fool proof that even careless
beginners got good pictures with it."
(Signed) Nicholas Hiaz.
M R. NICHOLAS HAZ, celebrated Pho- Landscapes, portraits, microscopic photos, pan- tographer, Painter and Illustrator dis- oramic strips, interiors, etc., are photographs covered. for himself the remarkable of perfection with a Leica. Enlargements to
versatility of the famous Leica Camera. The 12"1 x 18" lose nothing ini definition. And posi- extracts from his letter are indeed words of tive film made from the negative is used for
praise when it is considered that he has at screen projection. Truly an instrument of his command almost every type of camera accuracy and precision, and inexpensive to
made. operate. See the Leica at your dealer's
If you appreciate perfect pictures, a camera or send coupon for catalog 1166 that can meet nearly every conceivable de- _ -
mand, then you will enthuse over the Leica. E. LEITZ, Inc., Dept. F.F., 60 East 10th St.,
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era with a Focal Plane shutter. Weighs less Please send me catalog no. 1166 describing
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For any degree of Magnification from 30X to 200X The entire stand of this new microscope is a one-piece
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Professor of Cytology, Washington University, St. Louis
With an INTRODUCTION BY EDWIN R. EMBREE
President of Julius Rosenwald Fund, Chticago
A brilliant and comprehensive survey of the results of investigations in the great group of sciences vitally affecting man and not only affording students of special sciences a broad general background and perspective but also giving the intelligent layman stimulating insight into the great body of knowledge in these several branches of learning and an interpretation of the bearing of the various specialties upon man and the possibilities of his further development. Here is one significant answer to H. G. Wells' lament: "If only the, scientists would tell us less mumblingly what it is all about! "
Twent&-live world-famous scientists discuss: Part I PERSPECTIVE Life in Space and Time, HENRY NoRRis RUSSELL.
Evolution Traced Biochemically, A. B. MACALLUM-The Animal Ancestry Part II of Man, WILLIAM K. GREGORY-The Evolution of the Brain, G. H. ORIGIN OF MAN PARKER-Mental Evolution in Primates, ROBERT M. YERKEs-Societal
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GENETICS A Periodical Record of Investigations bearing on Heredity and Variation
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