Abstract: A chair on which a user assumes a kneel-like sitting posture. The chair includes a floor-engaging support and a seat mounted on the support. The seat includes a posterior and leg supporting seating portion articulatable with respect to the support between a substantially horizontal plane and a forward downward inclined plane in which a user assumes the kneeling-like sitting posture, and a crotch supporting tongue for supporting the user in the kneeling-like sitting posture. The chair also includes seating portion adjustment apparatus for inclining the seating portion into the forward downward inclined plane.

Abstract: There is provided a method for forming a subterranean fluid permeation control layer in an area of ground. The method comprises the steps of forming a first portion of a trench of a predetermined depth from the surface of the ground and sequentially widening the trench along one side of the previously formed trench while selectively, simultaneously applying a fluid permeation layer substantially along the bottom surface of the previously formed trench and while at least partly covering the layer with earth removed from the widened portion of the trench being formed until the entire area of the ground is covered. The invention also provides a device for carrying out this method.

Abstract: There is provided a method for subterranean insulation of an area of the ground against water seepage therethrough. The method comprises the steps of forming a first trench of a predetermined depth from the surface of the ground and widening the trench by sequentially forming additional trenches along one side of the previously formed trench while simultaneously applying a water repellent layer substantially along the bottom surface of the previous formed trench and while at least partly covering the layer with earth removed from the additional trench being formed until the entire area of the ground is insulated. The invention also provided a device for carrying out this method.