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Carl Schleicher & Schuell Co.

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Page 1: Carl Schleicher & Schuell Co.

REPORT FOR ANALYTICAL CHEMISTS

Advances in instrumentation have been accompanied by equally substantial progress in providing adequate facilities for analytical research, develop­ment, and testing. Shown at top is General Electric Company's standardizing laboratory at Schenectady in 1897. Below is the way GE's research labora­tory near Schenectady appears today. The main building is in the foreground and the metals and ceramics building near the water tower

seemed to be tha t the well of new discoveries in inorganic chemistry had run dry. Before the trend had fairly gotten started, however, the development of new products and processes started bringing about a need for better methods of analysis and control.

Friedrich Emich's microchemical work from 1900 onward established him as the founder and pioneer of the science of microchemistry (1). In 1911 his "Lehrbuch der Mikro-chemie" was published and the out­line of microchemistry was estab­lished, mostly on the basis of ex­

perimental work of Emich and his assistant, Julius Donau.

In 1910, Fritz Pregl—like Emich, an Austrian from Graz—-investigat­ing the bile acids, found occasion to extend the use of microchemical methods to the organic field (2). He continued his interest in organic micromethods, and his efforts in de­veloping them were recognized through a Nobel Prize in Chemistry presented to him in 1923. His text on the subject helped to stimulate interest throughout the world, and by the time the third edition of "Quanti tat iv Organische Mikro-

Less t h a n

0.007% Ash-for Highest Accuracy

left: Platinum crucible, with 20 gr. S&S Ash-Free Filter Paper

below: Crucible after completed incineration

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For many years S&S Ash-Free Analyt­ical Filter Papers have been known for their extremely low ash content. They have been the choice of chem­ists who must have the most precise working tools.

To our knowledge, there is no filter paper with lower ash content on the market. In fact, ash content of S&S Quantitative Papers is considerably lower than all other papers we have t e s t ed - l e s s than 0.007%.

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MAIL THIS COUPON FOR FREE SAMPLER

Carl Schleicher & Schuell Co. Dept. AC-49, Keene, New Hampshire

Gentlemen: Please send me, free, an S&S Analytical Filter Paper Sampler,

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Company.

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I 1 I I I I

Circle No. 95 on Readers' Service Card

VOL. 3 1 , NO. 4 , APRIL 1959 · 1 9 A

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