AN IMPROVED ARRANGEMENT FOR THE MEASUREMENT OF CARBON DIOXIDE OUTPUT OF RESPIRING PLANT MATERIAL BY THE ELECTRICAL CONDUCTIVITY METHOD

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Abstract
A brief review of the application of the electrical conductivity method of estimating carbon dioxide in respiration measurements is given and an apparatus which employs this method is described. The apparatus was designed and constructed by the authors for the purpose of recording respiratory carbon dioxide output of plant material; it comprises an oscillator, amplifier, and vacuum tube voltmeter that work in conjunction with a special type of absorption tube. Sodium hydroxide solution is used as the absorbing reagent. A simple set-up for automatic recording is described.

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