Excellent Sensitivity and Delicacy of Control Levels and Adjusts Easily and Swiftly
THE ANALYST'S COLUMN
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iu WeicU CATHETOMETER • • • • • • •
l.l.HAlLETT, Suence Editor .ΐ* -
Vertical range TOO cm Vernier reading to 0.05 mm Telescope with rack and pinion Working distance 45 cm to infinity Tangent screw adjustment Level sensitive to 50 seconds of arc Vertical shaft of Stainless Steel
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rpHE sum total of human knowledge -*- today is a staggering amount. The publication of the current reports is causing concern in many quarters as to how it can be financially carried on, and the abstracting and methods of making this knowledge useful to work ers in the various fields are becoming a field of study for yet another spe cialist devoted to a study of the methods of coding and collating facts and figures for the research worker. The seriousness of this situation be comes apparent when research may be repeated, because it is becoming in creasingly difficult to make an ade quate search, or it can even be de cided that it is cheaper to carry out the study than to face the expense of a search and the gamble that an answer will not be found in the recorded liter ature, so that the cost of research must then be added to the cost of the liter ature survey. While the future may be different, we feel at present that the by-products of a literature search are stimulating and give hints as to sucessful approaches, even though the com plete answer is not found in published records. Those in the field of analysis are probably more aware of this general problem than anyone else. Their in terests spread over both the physical and chemical aspects of science, and published methods are recorded as frequently in journals devoted to gen eral fields as in those devoted to analysis. It is considered good practice for analysts to look at all sections of Chem ical Abstracts, if they are to keep up to date. However, the volume of liter ature has reached the point where this is impossible; consequently, the in dividual analyst is being forced to restrict his reading to his specialty, and V O L U M E 2 7, N O . 7, J U L Y 1 9 5
This cathetometer is intended f o r measurements a n d o b servations in both industrial a n d educational l a b o r a t o r i e s wherever an inexpensive instrument of g o o d precision Is needed. It is r i g i d l y constructed a n d every essential a d justment can b e m a d e simply a n d positively. The telescope is mounted horizontally on a c a r r i a g e which m a y be moved up o r d o w n o r around the 3 0 - m m vertical rod: A tangent-screw adjustment permits precise leveling a n d a sensitive elevation adjustment is incorporated in the c a r r i a g e . A n a u x i l i a r y level in the base g r e a t l y acceler ates the leveling process. M a g n i f i c a t i o n is 1 2 x a t 4 5 cm. No. Write
for descriptive
68A—Each $196.50 circular
W. M. WELCH SCIENTIFIC COMPANY Division
of W . M. Welch Manufacturing
Company
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A SYNCHRONIZED P I C T U RLE . . .
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Μ Ε Τ A L A BE q u i p m e n tC o r p . 2 5 2 Duffy Ave., Hicksville, Long Island, Ν . Υ. NAME
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ANALYST'S
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the breadth of his approach to his problem is seriously curtailed. We wish we had the answer to this problem. If it is more generally recognized, however, perhaps its solution can be part of the general study of how the findings of science can best be recorded in the future, so that a feasible and economical literature search can be made and the individual scientist enabled to keep up with all findings which are useful in his research. We are not saying by implication that specialists are not valuable. Through their ef forts they are the only means by which complicated techniques arising out of fundamental scientific studies can be applied to analytical problems. How ever, those dealing with analysis, whether specialists or not, must con stantly be on guard not to let spe cialization keep them from being alert to new approaches which can better solve their problems related to what is it and how much. The increasing time given by uni versity professors in their lectures to the importance and methods of using the scientific literature is to be com mended. We think, however, that it is important to warn the student about the difficulties w7ith which he is faced today in carrying out an adequate search, difficulties that were not present when the professor was a graduate student. It is to be hoped that as the answer to this general problem is reached, the mechanics will permit the individual worker to be part of the process in such a way that the by-products and stim ulation of ideas which come from literature searching will be retained. The thought processes working through association of ideas and imagination with a touch of inspiration have been, and continue to be, the method whereby we accomplish exploration of the un known. They cannot be duplicated by a mechanical brain. It hardly seems likely that man will invent a device which will exceed his own powers. Creativity, whether it be with ideas or things, still gives human beings basic satisfaction, and too much idle leisure due to mechanical aids can create a frustrated state of mind amidst a seeming paradise. VOLUME
2 7, N O . 7, J U L Y
1955
N*M«R
penetrates barriers . . . The inability of the human eye to see into the world of the atom is a major barrier to research . . . a barrier that is rapidly being breached by the penetrating "eye" of Varian's V-4300B High Resolution n-m-r (nuclear mag netic resonance) Spectrometer. Here is an instrument of notable importance in advancing the study of molecular systems . . . permitting rapid, non destructive analyses of multi-component mixtures, providing accurate identi fication of functional groups with a minimum of effort. N E W SAMPLE S P I N N E R — Brought to commercial reality in the Varian r.f. Spectroscopy Laboratory, an ingenious sample spinner provides even higher resolving power, separates closely-spaced resonances by averag ing out the effects of magnetic field gradients . . . another milestone in the exciting story of Varian-developed
n-m-r spectroscopy.
THIS IS N-M-R AT W O R K H
SPECTRA u
1NTERPRETAT10N
DATA
