AbstractTests on the through‐circulation drying of Zostera marina on a semi‐commercial scale have been conducted with a batch dryer to determine the optimum conditions. There was a maximum feasible loading for grasswrack (eel‐grass) of approximately 3.8 lb./sq. ft. in each layer. The effects of variations in the rate of air flow, of amount of air recirculated, of air‐flow reversal and of temperature (160–220° F) have been studied with particular reference to output and
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