Respiration Apparatus

Catalogue No. 4011950

To measure transpiration, without breakage. Only one glass component (the capillary tube) and is mounted on a strong backing plate. It consists of a capillary tube with millimetre scale connected via a 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. Dimensions overall 155 x 165 x 60mm (width x height x length). Capillary tube 120 x 1mm (length x bore).

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.

Catalogue No. 4012100/1

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.