Abstract: A modular rack for storing and organizing cassettes comprising: a rack assembly having a generally rectangular left and right side member, each side member having an outer and an inner side portion, a front and rear side portion, and a top and bottom edge portion; wherein each said inner side portion has a plurality of spaced cassette end supports, each of which generally extend between the front and rear edge portion of the side member, and, a rear cassette stop positioned to limit rearward sliding of one of the cassettes along the end support; and, wherein each inner side portion has an upper and lower spacer to space and maintain the left and right side portions in parallel juxtaposition and, the spacers extend between spacer attachment means on the side members. The outer side portions of the left and right side members each have a coupling for lateral rack attachment so that assembled rack unit assemblies may be laterally attached to each other.

Abstract: A turbine has an upright shaft defining and rotatable about a vertical main axis, a support plate fixed to the shaft, a plurality of upright vanes pivotal on the support plate about respective vane axes offset from and generally parallel to the main axis, and a control plate rotatable adjacent the support plate about a vertical control axis. The control plate can be displaced relative to the support plate in an adjustment direction perpendicular to the axes. Respective formations on the vanes form grooves extending radially of the respective vane axes and open toward the control plate and respective link pins on the control plate are engaged in the grooves. Respective ring gears are provided on the control and main plates, centered on the respective axes, of the same diameter, and directed toward each other.

Abstract: A method of harvesting worms from ground soil includes forming a solution containing about 12 to 30 ppm chlorine in water by dissolving a solid tablet containing by weight about 1 to 10% sodium sulphate and the balance a metal oxychloride in water, pouring the solution on ground soil containing worms causing the worms to emerge from the ground, and collecting the worms.