Bottle, Canada Balsam
Catalogue No. 4012500
With drop-on cap and glass. Capacity 30mL.
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Plants Physiology
J Tube, Screw Fitting
Catalogue No. 4012300
Glass J-tube formed from 1mm bore thick walled capillary tube, with a brass screw and collar at the end of the longer limb. Used for sampling small quantities of gas held over water (e.g., in photosynthesis or respiration experiments). A bubble of gas is introduced into the short limb. This is then lowered into reagent solution and the bubble moved back and forth so that reagent diffuses through the end water seal. The change in length of the bubble indicates the amount of gas taken up by the reagent. Use potassium hydroxide for CO2 or alkaline pyrogallol for O2. Dimension: long limb – 250mm and short limb – 100mm.
SKU: 4012300 -
Plants Physiology
Ganong’s Potometer with PTFE Key Stop-cock
Catalogue No. 4012100/2
Comprises a graduated, narrow bore, horizontal glass measuring tube with a vessel for a plant shoot at one end and having a vertical limb with a stopcock and a funnel fitted by a ground glass joint. Mounted on a wooden stand. For Demonstration, of transpiration rates and rates of water absorption by a cut shoot under various external conditions. A plant shoot is sealed into a stopper which fits the end tube, and the whole apparatus is filled with water, the open end of the capillary tube, which is graduated in millimetres, dipping into a beaker of water. The position of the air bubble may easily be adjusted by opening the glass stopcock to admit water from the central reservoir. The whole apparatus is mounted on a varnished wooden base by spring clips. Comprises a graduate, narrow bore, horizontal glass measuring tubes with a vessel for plant shot at one end and having a vertical limb with a Teflon stopcock and a funnel fitted by a ground glass joint. Height to top of reservoir 170mm, Diameter of reservoir 20mm Length, overall 320mm, Base 320x80mm (L x W), Capillary bore 1mm.
SKU: 4012100/2 -
Plants Physiology
Osmosis Apparatus
Catalogue No. 4012250
This apparatus is designed for exploring the phenomena of osmosis and concept of osmotic pressure at elementary levels. Comprises a semipermeable membrane sealing the open mouth of thistle funnel having an indicator tube, which can be positioned in a reservoir. Supplied complete with dropping pipette.
SKU: 4012250 -
Plants Physiology
Potometer
Catalogue No. 4011960
Use to measure transpiration, without breakage. Only one glass component (the capillary tube) and is mounted on strong backing plate. It consists of a capillary tube with millimetre scale connected via three way tap to a syringe. The cut shoot is connected to the third outlet. It can also be used to measure humidity by connecting a porous pot to the third outlet.
SKU: 4011960
