The microsurgical microscope system with a stand with three parallelogram linkages and a microscope arranged thereon is characterized in that a second parallelogram linkage and a third parallelogram linkage have a common bar inclined at an angle of approximately 30 to 60 to the vertical. The upper case and a lower cases are coupled together with a space therein and a through-hole at the front to expose a lancet needle. The tabs serve to limit the insertion of the legs into the plant growth medium to allow horizontal growth of the plant under the level of the cup. Also, during playback the rate at which the duration is increasing is used to predict the duration and thus smoothly report the duration to the user. Recycling may occur to the fixed-film reactor to enhance nitrogen removal from one or both of the hydroponic reactor and the filtration device. Moreover, polarization scrambling means are provided together with polarizing means, with the polarization scrambling means being adapted to render the polarization of the optical signals entering the optical path either parallel or perpendicular to the axis of polarization of the polarizing means.