When tiny amounts of hormones are cast into your bloodstream, they can evoke profound effects on organs far from the gland that secreted them. The endocrine glands that produce hormones -- the pituitary, pineal, thyroid, thymus, parathyroids, adrenals, pancreas and gonads -- are scattered throughout your body. Some hormones, such as estrogen, originate from several glands and tissues.
Psychrometer An instrument used to measure the water vapor content of the air. It consists of two thermometers (dry bulb and wet bulb). After whirling the instrument, the dew point and relative humidity can be obtained with the aid of tables.
Durometer is one of several measures of the hardness of a material. Hardness may be defined as a material's resistance to permanent indentation. The durometer scale was defined by Albert Ferdinand Shore, who developed a device to measure Shore hardness in the 1920s. The term durometer is often used to refer to the measurement as well as the instrument itself. Durometer is typically used as a measure of hardness in polymers, elastomers, and rubbers.