ELECTRO CHROMA TOGRAPHY Q : WHAT IS IT? A : The process flawlessly performed by our Cascade Electrode Electrophoresis Machine. Q : HOW IS IT ACCOMPLISHED? A : Two innovations make it possible: Vertical cascading electrodes provide a uniform horizontal field strength without heat or electrolysis—and—A horizontal trickle feed supplies a uniform vertical hydro-dynamic buffer field. Q : WHAT OTHER ELECTRO-PHORETIC PROCESSES CAN THIS CASCADE ELECTRODE APPARATUS PERFORM? A : Progressive laboratories are utilizing this apparatus for Preparative Strip Chromatography, Star Electrophoresis, Continuous Flow Electrophoresis, Fraction Collecting and Electrochromatography with remarkable accuracy and reproducibility. Q: WELL—WHAT IS ELECTROCHROMATOGRAPHY? A : Simply, the product of vertical and horizontal forces working towards perfection. Electrochromatography is the resultant separation of controlled horizontal field strength and controlled vertical hydro-dynamic force.
CASCADE ELECTRODE ELECTROPHORESIS available ready for operation w i t h 2000v, 100 m i l l a m p , c o n s t a n t - c u r r e n t power supply, buffer p u m p a n d t a n k . at your laboratory supply
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Dept. AC1162, 820-05 97th AVENUE
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Circle No. 98 on Readers' Service Card 28 A
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ANALYTICAL CHEMISTRY
INC.
QUEENS VILLAGE, N.Y.
REPORT fragments present in the floor m a t which were completely hidden from visual observation. These were removed and subsequently identified as originating from a brass brad which, again, was not a p a r t of t h e aircraft. T h e foreign wires and brass fragments were located mostly in one area of the aircraft centering around seat number 6. Julian Frank's arm contained a small, flat, stamped fragment of brass which also was foreign to t h e airplane. Investigation developed t h a t when Mr. F r a n k boarded flight number 2511, he had carried an attaché case which had been purchased in a New York department store several years before. Diligent searching turned up an attaché case which closely matched t h e one he had carried. The stay hinges on this bag were secured with brass brads. Metallurgical, spectrographic, and microscopic comparison examinations showed these brads to be similar in head shape and size, shank shape and size, and in accidental fabrication markings as well as in composition to the torn and twisted brass brad fragments located in the floor m a t . The lock component of the a t t a che case had a boxlike steel housing on the back side. This housing was attached to t h e front brass plate by four bent " e a r s " of t h e brass plate. Again, metallurgical and other examinations showed t h a t the " e a r s " on the attaché case lock were similar in thickness, width, shape, and in accidental markings made by the fabricating machine, to t h e small flat brass fragment found in Mr. F r a n k ' s arm. Sample zipper teeth originating from various manufacturing sources were subjected to other metallurgical examinations. These showed that the zipper tooth driven through the life jacket and t h e one which had been forcibly driven into a floor m a t section had in all probability originated from a " P a n American" flight bag. Metallographic examinations of cross sections of some of the small fragments of aluminum aircraft metal found during m a n y phases of the laboratory processing revealed t h a t they had been subjected to unusual stresses. The fragments bore
