Abstract: A microorganism culturing apparatus that is capable of minimizing multiplication of unwanted miscellaneous germs and repeatedly producing the same culturing space includes a transparent bag that defines a container. A gas introduction tube and gas supply tubes are provided in the bag. The bag filled with a culture solution is disposed in a box so that the box holds the bag in an approximately rectangular configuration. The box is made up of a framework having a low-profile, substantially parallelepiped shaped configuration, and flat, transparent plates removably fixed to front and back sides of the framework.

Abstract: A suspension device for motor driven vehicles such as snowmobiles comprises a pair of slide rails which are resiliently suspended under the vehicle body to ensure engagement of the ground-engaging portion of a flexible endless track with the ground, the endless track being driven by a drive sprocket wheel journalled on the front portion of the vehicle body and stretched at its rear portion over rear idler wheels journalled on the rear portions of the slide rails. The resiliency of the suspension device is adjusted to prevent skidding of the rear portion of the endless track.