Abstract: An exercise tool for small animals includes a rotating wheel 1 having an opening 1 formed on a front side, a wall surface portion 15 formed on a back side, and a through hole 13 formed in the wall surface portion 15; a bearing holder 2 inserted into the through hole 13 from the back side; a bearing 3 attached to this bearing holder 2; a cap member 4 coupled to the bearing holder 2 from the front side for securing the bearing holder 2 to the wall surface portion 15 of the rotating wheel 1; and a shaft member 5 attached to a stand 100. The shaft member 5 has a shaft 52 formed thereon to be press-fit and coupled to the bearing 3.

Abstract: A water feeder filter water feeder includes a water storage tank and a water drinking portion. The filter supplies and returns water from the water storage tank to the water drinking portion. The filter is detachably provided between the water storage tank and the water drinking portion and passes the water from an upper surface side to a lower surface side of the filter. The filter includes a filter tray with a bottom wall having a water passing aperture and an outer peripheral wall. An internal filter medium is in the filter tray. A top covering filter medium covers an upper end opening of the filter tray. A partition wall of the filter tray is formed with a lower side is positioned inner than an upper side when viewed from each chamber. The outer peripheral wall is formed with a lower side is positioned inner than an upper side.

Abstract: A water feeder filter water feeder includes a water storage tank and a water drinking portion. The filter supplies and returns water from the water storage tank to the water drinking portion. The filter is detachably provided between the water storage tank and the water drinking portion and passes the water from an upper surface side to a lower surface side of the filter. The filter includes a filter tray with a bottom wall having a water passing aperture and an outer peripheral wall. An internal filter medium is in the filter tray. A top covering filter medium covers an upper end opening of the filter tray. A partition wall of the filter tray is formed with a lower side is positioned inner than an upper side when viewed from each chamber. The outer peripheral wall is formed with a lower side is positioned inner than an upper side.

Abstract: A dosimeter analysis system provides the capability to easily handle the radiochromic pieces of film which are commonly employed as dosimeters and make an accurate analysis of the amount of radiation received in an irradiation process. The dosimeter is constructed through use of one or more layers of a material such as paper, cardboard or non-woven material between which a piece of radiochromic film may be positioned. Through at least one of the layers, an aperture is formed which provides for the direct viewing of the radiochromic film. This dosimeter card may then be placed in a dosimeter card holder and placed in an analysis device such as a spectrophotometer. Also included on the dosimeter card may be a unique marking which provides a reference to unique information pertaining to the piece of radiochromic film employed in the dosimeter card.

Abstract: A clarifying device for use in an aquarium that includes a casing having at least one transparent portion. A plurality of clarifying pieces are confined in the casing. Each piece has a bulk density of from 0.7 to 1.3. When aquarium water flows through the casing, the clarify pieces flow in the casing and clarify the aquarium water.