The invention provides an incubator 1 wherein a microplate transport device 5 is disposed inside a chamber 11 centrally thereof. In the above, the channel grove for the hydraulic oil is formed due to a convex portion which is formed on the mold so as to project into the hollow portion. The use of the illuminating device andor the image recording device is substantially synchronous with the movement of the object and substantially parallel to the direction of movement of the object. One or more roller assembl may be included within a hardware system for mounting a structure such as a door panel, a window panel, a window covering, a decoration or the like that is able to be rolled along a base surface by the roller assembly. A method for the production of nitrate products is also disclosed.