specific humidity was found to range from 74 to 82 grains of water vapor per pound of dry air in order to confirm that dehumidification was accomplished without release of the latent heat of the water vapor removed from the air the dry bulb temperature of air entering the duct and of the air between the laminate and the fan were measured with the fan running it was found that at equilibrium after the heat retained by the laminate after regeneration had been rejected the air entering the duct was consistently 1 2 degree c cooler than the air between the laminate and the fan both when the laminate was removing moisture from air circulated in contact with it and when it was saturated and therefore not removing moisture after the first cycle of dehumidification the laminate was found to weigh the same i e 410 grams as before dehumidification was commenced the reason for this is not understood as it is clear from the data presented above that moisture vapor was removed during this cycle the possibility is suggested that air was entrained on the surface of the laminate before dehumidification was commenced and that the water vapor removed from the air during dehumidification replaced an equal weight of the entrained air after the first cycle of regeneration the laminate was found to weigh.