High Form- High Sensitivity -Convenient S T A I N L E S S STEEL
THE
Triple-Beam Balance Highly resistant t o cor rosive action o f l a b o r a t o r y fumes.
ANALYST'S
3 graduated scale levels f o r easy r e a d ing. Riders move easily.
COLUMN
L.T. HALLETT, Science Editor
G r o o v e d A g a t e Bear ings a r e p r o t e c t e d against d a m a g e . Y e t r e a d i l y accessible f o r cleaning.
'T'HB Philadelphia ACS Miorochemical Section, cosponsoring with the MetropoUtan Microchemical Society, held a symposium September 17 on microchemistry and microchemical in strumentation in connection with the First International Instrument Congress and Exposition, sponsored by the In strument Society of America at Phila delphia. Featured was an exhibit showing the development of microchemistry. I t consisted of apparatus used in the early days when the usual questions asked were, "Will it ever be practical?" and "Isn't the skill required beyond most analytical chemists?" Because of con ditions beyond our control we lived through those early days, and until we saw the exhibit had forgotten the de tails of the early struggles of those who were connected with microchemistry. From 1925 to 1930 in the U.S.A. there were probably no more than half a dozen analysts who knew enough about the subject to carry out a quantitative analysis. Contrast this with a well at tended symposium where well estab lished techniques are discussed by ex perts from universities and industry. The dazzling array of chromiumplated microchemical apparatus now manufactured by several companies is in sharp contrast to that displayed at the historical booth of the exposition. The statement was made by one speaker that excellent results were ob tained by the early pioneers with very simple apparatus when compared with that available today. That is true, but it is also true that today even technicians, when properly trained, can, with the mod ern equipment, obtain equal, or in some cases better, results. It has always been Benedetti-Pichler's thesis that there is nothing miraculous about microchemis try if you maintain the same concentra tion as in an ordinary analysis, so that the only problem involved is the tech nique of working with small quantities. This can in some cases be an oversimpli fication, but it puts emphasis in the V O L U M E 2 6 , NO. 10, O C T O B E R
H a r d , C o b a l i t e Knife Edges maintain true e d g e indefinitely.
Provide» Rapid, Accurate Weighing CAPACITY 111 g . (With extra weight 2 0 1 g.) SENSITIVITY No. 4030
0.01 a . or less
CORROSION-RESISTANT · ONE-PIECE BEAM CONSTRUCTION FUNCTIONALLY DESIGNED · RAPID ZERO SETTING N o . 4 0 3 0 Triple-Beam Balance—Stainless Steel EACH $ 2 7 . 5 0 (Extra Weight $ 1 . 5 0 Additional)
W. M. WELCH SCIENTIFIC COMPANY DIVISION OF W. M. WELCH MANITACTURINO COMPANTS ESTABLISHED 188Π 1
1515 Sedgwick St.. Depl. A - l , Chicago 10, Illinois. U.S.AJ For further information, circle number 15 A-1 on Readers' Service Card, page 57 A
L A B R I T E C T U R E . . . A New Technique
of Laboratory
INDUSTRIAL LABS
Planning
METALAB offers a basic method in laboratory planning . . . called, "LABRITECTURE." This technique will assist and direct you in the modernization and expansion of your laboratory or in planning a new one. Our new 4B Catalog and Manual will give you the sound basis for solving these laboratory problems. For complete "LABRITECTURE" details request our new 180-page Catalog 4B.
Μ E Τ A L Α ΒEquipmentCorp. 2 5 2 DUFFY AVENUE, HICKSVILLE, L. Ι., Ν . Υ. METALAB EQUIPMENT CORP.,
EDUCATIONAL
252 Duffy Ave., Hkksville, L. Ι., Ν. Υ.
G e n t l e m e n : Please send a copy o f y o u r new 180-page C a t a l o g 4B t o : Nam e
Title
% Company Address City
_ _ . Zone
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For further information, circle number 15A-2 on Readers' Service Card, page 57 A
1954
ISA
