Abstract: An automatic polishing machine for polishing aircraft windows uses pressurized air to create a suction to hold the polishing unit on the aircraft, creates a suction to automatically pick up a polishing pad, which is impregnated with polishing compound, and, using a motor driving through a flexible drive joint, and using X and Y axis step motors, drives a polish head along the aircraft window, polishing the window.

Abstract: A rabies vaccine composition is disclosed which comprises a sterilized suspension of proteineous suckling mice or rat brain particles of injectable particle size laden with an amount of inactivated rabies virus which is equivalent to a virus titer of from at least about 10.sup.5 to about 10.sup.7 MLD.sub.50 per 0.01 milliliter thereof at a brain tissue concentration of from about 3 to about 6% by weight, in an aqueous buffer solution having a pH of between about 7.5 and about 8.4, and comprising an amount, dissolved therein, of between 0.03 and 0.08 moles per liter of a buffer composition comprising a mixture of an organic base of the formula ##STR1## wherein R.sub.1 and R.sub.2 each are hydrogen or CH.sub.2 CH.sub.2 OH and an acid addition salt thereof, preferably a mixture of tris (hydroxymethyl)amino methane and its hydrochloride. The vaccine composition exhibits a high potency and its pH value remains stable over a prolonged period of time.

Abstract: This invention relates to structures employed to support tennis screen structures. Provision of a screen structure which is more readily and accurately manufactured and installed, easier to repair or replace, and adaptable to various standard heights, to the wide variety of tennis court complex dimensions, and to a variety of strength requirements, is achieved by the invention. A jointure apparatus includes a member (17) with attachment and flap portions (18,21), screen structure being secured between the flaps (21). Another member (22) has at least one hollow cylindrical member (24) for receiving portion (18). A member (31) has a hollow cylindrical member (32) for receiving portion (18) and flap members (36) for receiving screen structure therebetween.