Plant Physiology
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Plant Physiology
Respiroscope, Simple
Compact unit to compare rates of absorption or evolution of gases by small organisms during respiration. Two stoppered boiling tubes are connected by three-way taps at either end of a manometer. One tube holds the organisms and has a syringe for altering level of liquid in the manometer during setting up. The other tube acts as a control thermo-barometer.
B13370 -
Plant Physiology
Photosynthesis Apparatus
For measuring and analysing gas given off by plants.Comprises a 1 mm bore capillary tube graduated 0-10 cm in mms and connected to two 2 ml syringes. The gas can be drawn along the capillary by one syringe and collected into the other for analysis, mounted on board.
B13385 -
Plant Physiology
Combination Dark Chamber
For experiments in phototropism with seedlings. Three-chambered case with channels to accept variety of shutters. One chamber has a window at top and back. Provided with clear, opaque and slot shutters and one orange and one blue filter. With three glass containers for seedlings. Overall size 180 x 530 x 180 mm.
B13397 -
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Plant Physiology
Rotating Disc Auxanometer
To measure plant growth rate. The recording arm 600 mm with a bristle tip at one end is mounted on an adjustable pillar enabling alteration of height and pressure of the bristle on a disc of 200 mm dia. The other end of the arm has three eyes to give x3, x4, x5 magnifications. A smoked disc is mounted on a circular plate which is clamped to a motor spindle, & has a central pin to prevent the lever passing the center. The disc rotates at a speed of one revolution per hour.
B13408 -
Plant Physiology
Rotating Drum Auxanometer
Records growth of a plant as a series of horizontal traces, the gap between which represents one hour’s growth. The recording lever has 3 notches giving x5, x7 and x10 magnifications and is mounted on an adjustable pillar to adjust its height and pressure on the pencil tip. The recording drum has a pull-through vertical slot which enables the lever to take up the slack in its thread and then draw a new trace at a lower level, on base. Lever is 680 mm and drum is 300 x 150 mm, circumference x-height. With paper strips, pencil, motor for drum, working on 220 / 240 V AC.
B13410 -
Plant Physiology
Clinostat, Electric
An electric motor rotates a drum in 15 minutes. The drum consists of a cork table to which germinating seedlings are pinned and has a perspex cover 105 x 100 mm (height x dia). A stand enables the angle of the cork table to be set at any desired inclination. Works on 240 V AC.
B13415
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