Abstract: An ophthalmic instrument support having a flat floor-supported base and a cabinet extends upward from one end of the base, a post projects upward from the cabinet and the upper end of the post pivotally engages one end of a horizontal frame upon which a table is mounted for limited horizontal movement to permit a pair of spaced instruments thereon selectively to be brought into alignment with the eyes of a patient when seated in a vertically adjustable chair with the patient's lap extending beneath the horizontal frame. The post is adjustable vertically a limited amount to dispose the table and instruments thereon at a desired vertical position according to a doctor's eyes when the doctor is seated upon another chair opposite a patient.

Abstract: Certain fluorinated dimethyl ethers have been found to possess the stability, the compatibility and sufficient freedom from deleterious physiological effects to be used as aerosol propellants in cosmetic, hygenic, pharmaceutical and other personal products. These compounds, bis(difluoromethyl) ether and perfluorodimethyl ether, are also free of the chlorine atoms believed responsible for some destruction of ozone in the upper atmosphere.