A collector cart includes a body having an open rear end, which is closed by a canopy pivotally mounted adjacent its front end on the body adjacent its front end. The body has a support pivotally connected to caster wheel supports and a tow bar attached to a riding lawn mower hitch plate. Telescoping chutes connect the mower outlet with a canopy port to fill the cart with debris. When the cart is to be dumped, a first handle is rotated by an operator, who remains on the mower, to initially cause pivoting of a rear portion of a frame of the canopy, which includes a cover on the frame, relative to the body and the remainder of the canopy frame to release a locking connection of the rear portion of the canopy frame to the rear of the body. After the release is accomplished, a second handle is rotated by the operator to release the body from its tow bar with continued rotation of the second handle by the operator causing the body to pivot to a dumping position while the canopy pivots away from the body due to a rope of a fixed length connecting the top front portion of the canopy frame to the mower or a rod of a fixed length connecting the top front portion of the canopy frame to the tow bar.

A water clarifier for removing sediment comprises four successive compartments in which settling of the sediment is provided and clarified water removed. In three of the compartments, sediment contaminated water travels through a tortuous path to cause the sediment to settle to the bottom, forming a sediment bed in which the water is filtered. Sump means are provided to remove the sediment. Substantially clear water is directed from the third compartment to the bottom of the fourth compartment, pure water is exiting the fourth compartment near the top thereof and at the end of the compartment opposite the end at which the water entered. The clarifier is mounted on an easily transportable vehicle and is capable of treating approximately 150,000 gallons of contaminated water per day in which the water to be treated can be pumped directly from its source and the clarified water leaving the fourth compartment returned, thereby substantially eliminating excessive loss of treated water.

An accelerometer assembly is disclosed which includes an accelerometer mounting block formed of a rigid material having a proportion of the modulus of elasticity to the density of less than 15,000,000 psi/lb/in.sup.3. The natural frequency of the mounting block is safely below the accelerometer's response frequency but higher than the frequency to be recorded so that the mounting block does not resonate with high frequency vibrations and cause quick saturation of the accelerometer amplifier or erratic signals. The preferred mounting block is formed of polycarbonate, which is non-metallic, rigid, and lightweight, and has a natural frequency sufficiently below that of the accelerometer.

A collector cart includes a body having an open rear end, which is closed by a canopy pivotally mounted adjacent its front end on the body adjacent its front end. The body has a support pivotally connected to caster wheel supports and a tow bar attached to a riding lawn mower hitch bar. Telescoping chutes connect the mower outlet with a canopy port to fill the cart with debris. When the cart is to be dumped, a linkage mechanism is activated by an operator, who remains on the mower, raising a lift handle to initially cause rearward shifting of the canopy relative to the body to release a locking connection of the rear of the canopy to the rear of the body. The body is released from its tow bar at the same time so that continued raising of the lift handle by the operator causes the body to pivot to a dumping position while the canopy pivots away from the body due to a rope of a fixed length connecting the front of the canopy to the mower.

A rotatable perforated molding element for embossing and/or perforating thermoplastic sheet or film, the molding element including a series of perforated strips having two parallel sides and two parallel ends, the sides being perpendicular to the ends, each of the strips being welded at the end prior to placing the strips on a supporting drum. Additional strips are placed on the drum until the desired area of the drum is covered with the strips.

A laminated, cylindrical, metal screen or molding element for vacuum perforation of plastic film or sheets, comprising two or more relatively thin cylindrical metal screens, each having a predetermined inside and outside diameter and each having a plurality of openings or holes therein of a predetermined size and geometrical shape, and said relatively thin screens stacked and bonded together, diametrically one inside the other thereby providing a screen of a desired thickness and a desired hole geometry wherein the holes in the screen have substantially straight walls perpendicular to the surface of the screen.；A method of producing a relatively thick cylindrical metal screen for

A perforated thermoplastic film with less than ideally shaped tapered capillaries which has an increased liquid flow rate through the tapered capillaries and a method for making such a film. The method includes forming a perforated thermoplastic film having tapered capillaries from a resin into which an effective amount of a polarizable, migrating surfactant has been blended therewith and then treating the perforated thermoplastic film with a corona discharge treatment sufficient to increase the flow rate of liquid through said perforated film and provide a film having a percent run off of from about zero to ten percent.；The perforated film made in accordance with the invention has a much higher

Eugenics, the attempt to improve the genetic quality of the humanspecies by `better breeding', developed as a worldwide movement between 1900and 1940. It was particularly prominent in the United States, Britain andGermany, and in those countries was based on the then-new science ofMendelian genetics. Eugenicists developed research programs to determine thedegree to which traits such as Huntington's chorea, blindness, deafness,mental retardation (feeblemindedness), intelligence, alcoholism,szhiophrenia, manic depression, rebelliousness, nomadism, prostitution andfeeble-inhibition were genetically determined. Eugenicists were also activein the political arena, lobbying in the United States for immigrationrestriction and compulsory sterilization laws for those deemed geneticallyunfit; in Britain they lobbied for incarceration of genetically unfit and inGermany for sterilization and eventually euthanasia. In all these countriesone of the major arguments was that of efficiency: that it was inefficientto allow genetic defects to be multiplied and then have to try and deal withthe consequences of state care for the offspring. National Socialists calledgenetically defective individuals `useless eaters' and argued forsterilization or euthanasia on economic grounds. Similar arguments appearedin the United States and Britain as well. At the present time (1997) muchresearch and publicity is being given to claims about a genetic basis forall the same behaviors (alcoholism, manic depression, etc), again in aneconomic context – care for people with such diseases is costing toomuch. There is an important lesson to learn from the past: genetic argumentsare put forward to mask the true – social and economic – causesof human behavioral defects.