Pfeiffer’s,complete,as illustrated.
 

T-Tube with stopcock and graduated jar, without flowerpot
 

TRANSPIRATION With thermometer
 

On base,with jar for seeds,pointer and scale
 

Metal body with heavy base,fitted with a 30 hour clock drive which rotates the plant holder at one revolution per hour. Can be set at any angle between horizontal and vertical positions, complete with plant holder.

 

An electric motor rotates a drum in 15 minutes. The drum consists of a cork table to which germinating seedlings are pinned and has a prespex cover 105 x 100 mm htxdia. A stand enables the angle of the cork table to be set at any desired inclination. Works on 240 V.

 

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.

For experiments in phototropism. A stout cardboard black lined box with aperture tube and end cap. Overall size 200x160x130 mm, side tube 110 x 50 mm dia.

For analysis of air and expired gases. A graduated burette tube with rubber stopper at one end and a glass tube connected to rubber tubing fitted into a mohr clip. The other end is closed by a suba-seal stopper.

 

An aluminium case with glass sides to observe root development at different depths, with aluminium shutters to exclude light so that roots will grow down the inside of glass. Bottom panel has holes for drainage,  Overall size 380 x 70 x 270 mm.

Mounted on clear acrylic sheet.

Glass J-tube made out of thick-walled capillary tubing, with a  brass screw & collar at end of longer limb. Used for sampling small quantities of gas in respiration or photosynthesis experiments

 

Made from steel, capable of cutting very thin material, fitted  with brass pipe having holes.