. Electronic apparatus for biological research . -300 Figure Practical circuit for measurement of temperature by a thermistor— mains-operated unit. Thermistor type: 100 k^i at 20°C; suitable meter, 50 jjlA in series with 50 k^. The selector switch covers the ranges 15-20, 20-30, 30-50, and 50-100°C

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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity