Abstract: An effervescent dentifrice in chewable tablet form particularly effective in controlling Bacillus Acidophilios comprising a compressed homogenous mixture of an acid neutralizer, a cariespreventative, an acid, a wetting agent, and flavoring and sweetening agents. Upon crushing the dentifrice tablet in the mouth, a pleasant-tasting, effective microbicide is released.

Abstract: A model, portable stage assembly capable of being disassembled and operatively assembled so as to predetermine the design of an intended set including the arrangement of various model furniture or other scaled down set elements. The assembly comprises a stage means including a relatively soft, penetrable surface on which a plurality of set elements can be positioned and rearranged by contact means in the form of pins or the like serving to penetrate the surface and thereby be fixedly positioned in a determined area. Housing wall elements, backdrop elements including side curtains and a facing are all movably connected to the stage base and floorings in an adjustable predetermined relation to one another so as to allow the arrangement or predetermination of a set design on a scaled down basis.

Abstract: A process for the extraction and recovery of aluminum from aluminum-containing raw materials by contacting said raw materials with fruit juices and complexing organic acids.

Abstract: An error-free, data telecommunication system designed for continuous high speed error-free data communications over dial-up voice grade circuits comprising a high speed data transmission section including internal data buffering and a low speed reverse channel ARQ (automatic request for repeat) receiver and a high speed data receiving section including a low speed reverse channel ARQ transmitter whereby high speed data and reverse ARQ signaling are transmitted simultaneously over a two wire dial-up network. The system is capable of half-duplex, two wire operation and full-duplex, four wire operation.