Biology
Showing 65–80 of 283 results
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Human Anatomy
Functional Human Eye
Catalogue No. 4072800
A unique apparatus allows you to recreate the conditions of visual deficiencies in the human eye. The clear silicone elastic lens chamber of the model is filled with water. When water is added or subtracted with the included syringe, the curvature of the lens is changed, which alters the focus of images projected on the retina. The shape of the eyeball is adjustable as well. Once the deficiencies have been observed, the included corrective lenses can be added to show how vision defects can be modified. The five-piece model is mounted on a base with the projection object on a separate stand. The set comes with two lenses, lens holder, projection object, model, and instruction manual with numbered Key Card.
SKU: 4072800 -
Plants Physiology
Ganong’s Potometer with Glass Stop-cock
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.
SKU: 4012100/1 -
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
