324 



GROWTH OF PLANTS 



Figure 133. 4, Redwood plants grown for 55 days on 12-hour days in constant condi- 

 tion room. The figures above the plants show the light intensity in foot-candles. 5, Red- 

 wood plant from the greenhouse shades, grown from March 27 to October 22, 1928. The 

 figures on the pots show the light intensity in percentage of full sunlight. 6, Redwood 

 plants grown in outside shades June 1 to Sept. 26, 1928. Figures on the pots show the 

 light intensities in percentages of full summer sunlight. 



