For the observation of habits of earthworms. Consist of a
free standing vertical, wooden frame having two slots for
glass plates with 25 mm separation. Dimensions 385 x 250
mm Ht. x Width
For recording graphically the movement of heart, muscles
and a number of other basic physiology experiments. Casted
aluminium body, fitted with levelling screws; with eight
-1
speed gear train to provide direct all the eight speeds mms
640, 312, 25,12.5,2.5,1.25, 0.25 & 0.12. Smooth and
durable performance with the continuancy of speed even
after years of use. Change over of speeds from one ratio to
the other effected through an adjustable clutch on the side
plate showing the speed. Drum provided with neutralizing
clutch, electrical contact block and contact arms. Stainless
steel axle of 19 mm dia. with screw lift and moves in ball
bearing to give smooth performance.
Globes, Map - World, Asia, Europe, Africa, North America,
South America, Australia, World density of population, World
Ocean Routes, Mountains, Rocks and Volcanoes, Oxygen
cycle, Carbon cycle, Nitrogen cycle, Water cycle, Rivers in
action.
