V ARIETY of organosilicon films have been applied to glass surfaces, Contact angle with water, surface resistivity, and dry lubricity of the treated surfaces were invariably found to be considerably increased over the values for untreated glass. Contact angles of 90-110°w ere readily obtained from a wide selection of organosilicon structures with no marked systematic variations between species. The coefficient of friction for glass surfaces treated with a series of alkyltrichlorosilanes decreased progressively as the length of the alkyl chain increased. All types of organosilicon films studied w ere capable of raising the surface resistivity of glass from 10-s or 10-s up to 10"12 to 10"13. These high resistivities were maintained until the contact angle to water dropped below 60°. The

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