1912.1 



PUBLIC DOCUMENT — No. 31. 



153 



Table VII. — Showing Maximum and Minimum Resistances based on 

 the Averages obtained from the North, South, East and West Sides of 

 Maple Tree {Acer saccharum, Marsh) for Different Periods during the 

 Day, March 18-31, 1909. 



8 A.M. West, highest, 71,832 



North, 67,654 



South, 62,130 



East, least, 50,155 



12 M. North, liighest, 48,044 



West, 45,300 



South, . 44,610 



East, least, 37,567 



4 P.M. North, highest, 40,174 



South, 39,580 



West, 36,560 



East, least, 35,847 



This table is adapted from Table V. It will be noticed that 

 the highest average resistance was obtained on the west side for 

 the 8 A.M. observations, and the north side gave the highest aver- 

 age resistance for the two following observation periods, viz., at 

 12 M. and 4 p.im. The lowest average resistance from March 

 18 to 31 occurred on the east side for each of the three periods. 

 The average daily resistance for the whole period — 9 a.m. to 

 4 P.M. — was as follows : north side, 51,957 ; west side, 51,280 ; 

 south side, 48,773 and east side, 41,189. These results coincide 

 with those given in the preceding tables, that is, the north side 

 shows in general the highest resistance. 



Table VIII. — Showing Electrical Resistance (in Ohms) of Maple {Acer 

 saccharum, Marsh) from March 18-31, 1909. Resistances taken at 

 8 A.M., 12 M. and 4- p-m. on the South Side of the Tree. 



(Electrodes 8 feet apart. Temperature same as in Table VL| 



