Abstract: A high-lift mower is disclosed. The mower includes a frame, at least two wheels disposed along opposite sides of the frame and having a space between them, and a blade rotation mechanism, mounted to the frame, for providing a rotational force relative to the frame. A blade assembly is coupled to the blade rotation means. The blade assembly comprises a plurality of cutting blades. Each of the plurality of blades includes a front face having a cutting blade and a rear face disposed away from the front face. The rear face has a lift portion. A roller assembly is adjustably coupled to the frame for, upon engagement with a surface located in the space between the pair of wheels, maintaining the blade assembly a predetermined distance above the surface. A blade assembly and a roller assembly for use with the high-lift mower are also disclosed.

Abstract: A platinum catalyst which is prepared by reacting a platinum halide with an organic compound having at least one --C.tbd.C-- group in the presence or absence of a base to form a complex which promotes the addition of silicon-bonded hydrogen atoms to silicon-bonded aliphatic unsaturated hydrocarbon groups in the presence of no-clean flux.

Abstract: A platinum catalyst which is prepared by reacting a platinum halide with an organic compound having at least one --C.tbd.C-- group in the presence or absence of a base to form a complex which promotes the addition of silicon-bonded hydrogen atoms to silicon-bonded aliphatic unsaturated hydrocarbon groups in the presence of no-clean flux.

Abstract: Organopolysiloxanes having improved electrical properties, which comprises mixing an organopolysiloxane having reactive groups with an amine-containing organosilicon compound, which is capable of crosslinking with the organopolysiloxane and a treated alumina trihydrate and thereafter exposing the resultant composition to atmospheric moisture. The resultant composition may be dispersed in an organic solvent and applied to electrical insulators.

Abstract: A method for improving the activity of a platinum catalyst in promoting the addition of Si-bonded hydrogen atoms to compounds containing aliphatic unsaturation which comprises reacting an ammonium platinum silicon complex with a compound containing aliphatic unsaturation in the presence of a basic compound.