Abstract: A device for continuously measuring the skin local sweating rate includes a capsule used for applying on a human skin at a measuring point and an air supply element for supplying dehumidified air to the capsule. A first chamber is formed between the capsule and the skin for receiving water vapor perspired from the skin and the dehumidified air supplied from the air supply element to produce the mixture of perspiration oriented water vapor through the skin and the dehumidified air. A second chamber is also formed within the capsule and connected with the first chamber through a communicating hole. The device further includes a humidity detecting element disposed in the second chamber. The humidity detecting element varies its electrical circuit constant according to the relative humidity of the mixture. A temperature detecting element is disposed in the second chamber for detecting the temperature in the second chamber and for outputting signals corresponding to the temperature.

Abstract: A ventilator has a body in which an air-intake passage for introducing outdoor-air indoors and an air-discharge passage for introducing indoor-air outdoors are defined. An air-intake fan and an air-discharge fan are arranged in the passages, respectively. A filter is provided in the air-intake passage to filtrate air flowing through the air-intake passage. The flow resistance in the air-discharge passage is set higher than that in the air-intake passage.

Abstract: Electromagnetic wave-absorbing wall comprising ferrimagnetic plates arranged at some intervals in the direction of the electric field of the electromagnetic wave said ferrimagnetic plates being plates of ferrite having the following general formula:MFe.sub.2 O.sub.4wherein M is a bivalent metal such as Mn, Ni, Co, Mg, Cu, Zn and Cd, or plates of a mixture of ferrite powders or carbonyl iron with organic high molecular weight compounds, and said plates having a specified thickness according to the interval.