Bottle, Canada Balsam
Catalogue No. 4012500
With drop-on cap and glass. Capacity 30mL.
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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.
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Catalogue No. 4012200
For measuring and analyzing gas evolved by the plants such as Elodea. Comprise two syringes connected to a collecting tube through a 3-way tap. This arrangement enables the gas to be drawn along the capillary tube by one syringe for analysis. The apparatus is mounted on a back board about 240 x 100mm, capillary bore 1 mm.
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Combination Dark Germination Chamber
Catalogue No. 4012600
For experiments in phototropism with seedlings. Three-chambered case of wood with to accept a variety of shutters. The right-hand chamber has windows in the top and back end, when used with a clear front window, acts as a control chamber. Supplied with opaque shutter, a slot shutter to admit light from one direction only, the clear windows for the control chamber, one orange and one blue filter to show the effect of excluding various parts of the spectrum. Complete with three glass containers for seedlings. Dimensions overall 180 × 530 × 180mm approx. (height × width × depth).
SKU: 4012600
