634 Ganong. — An Undescribed Thermometric Moveme7it of 
Fig. 54. 
Abscissa spaces, each two days. 
Ordinate spaces, each 2-5 mm. of movement. 
Downward direction means inward of the shrub, and upward means outward. 
Showing the seasonal movement of four shrubs : — 
The upper is Salix laurifolia , 
the second is Cercidiphyllum japonicum , 
the third is Cornus florida , 
the lower is Broussonetia papyrifera. 
The entire lines are the north and south measurement, 
the dotted lines are the east and west measurement, 
the vertical lines across the polygons represent the time of complete leaf-fall and of the 
first appearance of the leaves from the bud (the latter for Cornus was not recorded). 
The disagreement of Broussoneida was connected with the death (winter-killing) of the plant. 
