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EXPERIMENT STATION RECORD. 

 Temperature of water in two u'ells at Juvisy. 



We have here two different sheets of water which, notwithstanding 

 tbeir proximity and almost equal depth, have not exactly the same 

 temperature, it being a little higher in well A (the more shallow one), 

 the difference varying from 0.2 to 0.9°. These sheets differ also chem- 

 ically. The water in well B is less potable and contains more lime. Tbe 

 annual difference of temperature of the two wells averages 0.33°. 



The average temperature of air, soil, and water for 1896 was as fol- 

 lows: Air, 9.80°; at the surface of the soil, 12.78°; the soil at a depth 

 of 0.10 meter, 11.35°; at a depth of 0.50 meter, 11.91°; at a depth of 1 

 meter, 12.61°; water at a depth of 14 meters, 11.32°. The temperature 

 of the waters of the two different wells varies but little in the course of 

 the year, the cold of winter and the heat of summer being slightly felt. 



ACTION OF ELECTRICITY UPON PLANT GROWTH. 



The question of the influence of electricity on plants has been tbe 

 subject of much discussion during the last few years. The results 

 obtained from experience were frequently contradictory. For this 

 reason some experiments were conducted in which copper and zinc 

 plates of 0.70 meter length and 0.15 meter width, bent at right angles, 

 were placed at the extremities of a plate 2 meters wide and 4 meters 

 long and stuck into the ground, the top being a little above the surface. 

 The plates were joined by insulated copper wires. Tbere were thus 

 created zinc soil copper piles on which it is supposed that an electric 

 current could be established. The current was rendered more active 

 by adding a Le Clanche pile of three elements and its influence on tbe 

 germination of seeds tested. August 31, 1894, 56 beans were put in 

 rows on each plate. The current was passed through for ten hours. 

 After this an interrupted current, sometimes during the night and 

 sometimes during the day, was passed through the apparatus. The 

 results are worthy tbe attention, as the evidence of an electric action is 

 positive. 



