Plant Physiology
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Showing 16–30 of 35 results
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Plant Physiology
Respirometer, Ganong’s
To measure gas evolved or absorbed by living materials or tissue extracts. A respirometer bulb with a small water reservoir at the bottom and hollow ground glass stopper at top in the neck with a hole which can be closed or opened by turning the stopper, a graduated burette opening out of the bulb which connects to a leveling tube via a rubber tubing. Respirometer chamber 50 mm dia, burette 180 x 20 mm graduated 0 to 25 ml and 100 to 75 ml, with special clamp for fixing to a 12 mm dia rod.
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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
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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 he other for analysis, mounted on board.
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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.
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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 centre. The disc rotates at a speed of one revolution per hour.
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Plant Physiology
Rotating Drum Auxanometer
Records growth of a plant as a series of horizontal traces, the gap between which represents one hours 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 xheight. With paper strips, pencil, motor for drum,working on 220 / 240 V AC.
