V O L U M E 2 1, NO. 4, A P R I L
1949
25 A
electr°n
How the RCA microscopy
hejps n m e r i c a n
Cyanamid
develop synthetic resins to make wet paper stronger You CAN CARRY your g r o c e r i e s h o m e in a p a p e r b a g w h e n the b a g is dry. But can you d o it w h e n t h e bag is w e t r Y o u can—if the p a p e r fibers are treated w i t h syn thetic resin w h e n the p a p e r p u l p is p r e p a r e d . T o study the physical p r o p e r t i e s of p a p e r fibers treated w i t h synthetic resins, A m e r i c a n Cyanamid R e s e a r c h l o o k s d e e p into the structure of p a p e r fibers—with an R C A Electron M i c r o s c o p e . T h i s in strument aids in revealing the m e c h a n i s m by w h i c h resins m a k e wet p a p e r s t r o n g e r . Because the Electron Microscope can resolve and magnify 20 to 50 times greater than is possible with light microscopes, and the depth of field is 75 to 150 times greater. T h i s superiority of the Electron M i c r o s c o p e also is an i m p o r t a n t factor in A m e r i c a n Cyanamid's de velopment of resin-treated textiles—fabrics that are waterproof, shrinkproof, and w r i n k l e p r o o f ! R C A w i l l b e glad to h e l p evaluate the usefulness of the Electron M i c r o s c o p e in t e r m s of your o w n appli cations. For information, simply w r i t e Dept. 4 8 D .
I" •
Untreated Alpha Pulp
—Magnification, 18,000 Χ.
SCIENTIFIC
RADIO of
Dr. Frederick G. Rowe slides a photographic plate into the built-in camera of the RCA Electron Microscope. By this means, perma nent records are made of specimens.
^
Alpha Pulp, treated with MELAMINE —formaldehyde-type resin Parez 607. Magnification, 18,000 X. Radio Corporation of America Scientific Instrument Section Dept. 48D, Camden, N. J. Please send me literature on the RCA Electron Mi croscope.
INSTRUMENTS
CORPORATION AMERICA
E N G I N E E R I N G PRODUCTS
DEPARTMENT.
CAMDEM.
In Canada: R C A VICTOR Company Limited, Montreal
N.J.
Name. Title_ Company Street City
_Zone_
_State_
