108 Gregory . — The I ncrease in Area of Leaves and 
\ 
In Figs. 8 and 9 are shown the curves of increase in area of the 
cotyledons and the first leaves of plants grown under one and two lamps 
respectively. The points plotted are the calculated areas, and are based 
calculated from all the daily observations. The discrepancies are seen to 
be small. In Tables VI and VII are found the areas of the cotyledons and 
foliage leaves on successive days for the average plant under two lamps and 
one lamp respectively. 
