Abstract: Provided is a chair in which the rear section of the seat can be raised with good lateral balance, in which the seat is stable, and that has a simple structure and a good appearance. The disclosed chair includes a seat (6) that is pivotally attached by means of a laterally-oriented pivot shaft (9) to a support base (5) supported by (a) leg(s), the rear section of the seat (6) being pivotable in the vertical direction. In said chair, an urging means (12) that urges the seat (6) upward is constructed so as to include: an elastic expanding-and-contracting component (13) that connects a portion of the support base (5) located below the pivot shaft (9) and a portion of the seat (6) located to the rear of the pivot shaft (9); and a pair of leaf-spring-like elastic warping components (14) provided on the right and left sides of the elastic expanding-and-contracting component (13).

Abstract: An improvement in the process for producing acrylic or methacrylic acid by the vapor phase catalytic oxidation of a system containing acrolein or methacrolein, respectively, is provided. The improvement resides in the employment, in such process, of a novel catalyst prepared by admixing with a solution of the catalytic component an organic substance, for example from the group of organic acids, alcohols, amines and esters, drying the admixture and subsequently calcining the admixture at a temperature in the range of 330.degree. C to 430.degree. C to form the novel catalyst.

Abstract: An improvement in the process for producing acrylic or methacrylic acid by the vapor phase catalytic oxidation of a system containing acrolein or methacrolein, respectively, is provided. The improvement resides in the employment, in such process, of a novel catalyst prepared by admixing with a solution of the catalytic components an organic substance, for example from the group of organic acids, alcohols, amines, esters and quinones, drying the admixture and subsequently calcining the admixture at a temperature in the range of 330.degree. to 430.degree.C to form the novel catalyst.