. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. TIMERS, COUNTERS AND RATE MEASUREMENT has devised a 'Woolworth' timer which converts the 50 cycle mains into a train of pips occurring every 10 msec: only a handful of components is used, as shown in Figure The waveforms are sketched in Figure Old. 250-0-250V H S130 001 ^F. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the or
. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. TIMERS, COUNTERS AND RATE MEASUREMENT has devised a 'Woolworth' timer which converts the 50 cycle mains into a train of pips occurring every 10 msec: only a handful of components is used, as shown in Figure The waveforms are sketched in Figure Old. 250-0-250V H S130 001 ^F. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Donaldson, Peter Eden Kirwan. New York, Academic Press
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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
