title: A digital diffusion porometer circuit.
abstract: An automatic digital diffusion porometer circuit is described. The circuit is highly stable with respect to temperature and supply voltage. The device is capable of high timing accuracy over very short measurement intervals, so that measurements may be made rapidly without the danger of stomatal changes occurring during the measurement period.
authors: Department of Botany, Duke University, Durham, North Carolina 27706.
authors: E L
authors: EL
authors: Fiscus