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E T Linacre

Publications and source records attributed to E T Linacre.

3 recordsLinked to original sources
PubMed1970

A thermistor leaf thermometer.

An instrument is described which allows measurements of leaf temperature within about 0.3 C. It consists of a special thermistor probe, a small circuit box, and a standard ammeter. The circuit box can easily be fixed to the meter and contains a battery, which passes 0.3 milliampere through the thermistor, and also contains an integrated circuit amplifier, so that the meter reads 20 C full scale deflection, with ranges adjustable in 10 C steps. Calibration experiments show the superiority of the thermistor leaf thermometer to a thermocouple pressed onto a rubber surface with a resilience resembling that of a leaf.

Journal Article↗
PubMed1967

Further studies of the heat transfer from a leaf.

The resistance to the diffusion of heat and water vapor external to a leaf, can be derived from measurement of the rate of change of the leaf temperature, after a sudden alteration of the intensity of irradiation. The theory of the method has been developed to accommodate the case of a leaf that is freely transpiring, exchanging longwave radiation with the environment and with different internal resistances on the 2 sides of the leaf. It has been successfully applied to measurements on wet blotting paper in the laboratory.

Journal Article↗