. Electronic apparatus for biological research . 7-Toothed wheel I Spring Figure Schematic drawing of a microelectrode pulling machine Another versatile mechanism, ascribed to J. W. Woodbury, is operated on a scissor principle. The tubing clamps are mounted at the ends of scissor action blades, as shown in Figure , operated by a spring causing them Spring

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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity