EDITORS' COLUMN " I N U R I N G 1968 a p r e l i m i n a r y
but
-*-^ intensive s t u d y of t h e reader ship of ANALYTICAL C H E M I S T R Y was
u n d e r t a k e n . T h e J o u r n a l now h a s over 32,000 subscribers a n d an esti m a t e d readership of over 100,000; therefore, it was felt t h a t proper ed itorial direction can be given if t h e Editors have a good grasp of t h e educational backgrounds, scientific proclivities, interests, a n d needs of the readers. An outside consulting firm has supervised t h e personal in terviewing and information compi lation required for three surveys, and in t h e coming months will work closely with t h e editorial staff in conducting new surveys and in eval uation of t h e d a t a obtained. I n addition t o this activity, t h e Editors have planned for several months to initiate with this begin ning issue of a new volume, changes t h a t should enhance t h e value of the J o u r n a l t o t h e readers. T h e new I n s t r u m e n t a t i o n feature t h a t begins on page 83A a n d selected changes in t y p e faces and format t h a t should improve readability throughout t h e book will be noted. T h e " L a b o r a t o r y of t h e M o n t h " a r ticle has been discontinued as a regular feature ; instead t h e Editors will strive for enhanced coverage of selected outstanding laboratories on a non-periodic basis. W e will wel come comments on these changes, and we will entertain suggestions from individual readers on m a t t e r s t h a t relate to improvement of our communication of information t o analytical scientists. Acoustical Holography An excellent article b y A. F . Metherell entitled "Holography with Sound" (Science Journal, 4, 57, N o v . 1968) is well worth t h e attention of those interested in t h e three-dimensional observation of objects. Advances in this field of research are rapidly being made, and applications in t h e realm of nondestructive testing and elec tronic detection appear t o be of urgent interest t o analytical scien tists. Other applications, such as underwater observations, geological and archaeological searching, a n d examination of t h e interior of t h e
For VUV-UVVisible-IR Spectroscopy
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The reason? Snap-in gratings that are automatically in focus and alignment. The unique, snap-in grating system (pat. pending) of the McPherson Model 218 provides immediate installation (without special holders or further adjustment) of any one of 30 dif ferent gratings. So you're ready to operate instantly in any range from 1050A to 16M. An effective aperture ratio of f/5.3 with a special aspheric optical system (pat. pending) enhances the performance of the Model 218 resulting in a 1st order half-width resolution of better than 0.3A with a 2400L/mm grating. The Model 218 operates in any attitude, in the vacuum ultraviolet, ultra violet, visible, and infrared regions. Whether you're a chemist, biochemist, metallurgist, physicist, astronomer, space scientist, or educator, you get maximum flexibility from this compact, portable, automatic scanning monochromator. McPherson offers a complete line of precision instru ments for accurate analysis of the spectral range from soft X-ray to near IR. For complete information on the versatile Model 218 .3 meter scanning monochromator, write or call: McPherson is your exclusive U.S.A. distributor for the book ESCA by Kai Seigbahn et al, an important new work on electron spectroscopy for chemical anal ysis. $25.20 per copy.
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