136 SENSITIVENESS OF THE APEX Chap. III. 



(3.) Eadicle 11 mm. in length, card fixed behind : after 9 h. 

 deflected in the plane of the bean 40° from the perpendicular 

 and from the card, and in opposition to Sachs' curvature. The 

 tip of the radicle more curved than the upper part, but in the 

 same plane. After 23 h. the extreme tip was slightly bent to- 

 wards the card ; the general curvature of the radicle remaining 

 the same. 



(4.) Eadicle 9 mm. long, card fixed behind and a little 

 laterally: after 9h. deflected in the plane of the bean only 

 about 7° or 8° from the perpendicular and from the card, in 

 opposition to Sachs' curvature. There was in addition a slight 

 lateral curvature directed partly from the card. After 23 h. no 

 change. 



(5.) Eadicle 8 mm. long, card affixed almost laterally : after 

 9 h. deflected 30° from the perpendicular, in the plane of the 

 bean and in opposition to Sachs' curvature ; also deflected in a 

 plane at right angles to the above one, 20° from the perpen- 

 dicular : after 23 h. no change. 



(6.) Eadicle 9 mm, long, card afSxed in front : after 9 h. de- 

 flected in the plane of the bean about 40° from the vertical, 

 away from the card and in the direction of Sachs' curvature. 

 Here therefore we have no evidence of the card being the 

 cause of the deflection, except that a radicle never moves 

 spontaneously, as far as we have seen, as much as 4€° in the 

 course of 9 h. After 23 h. no change. 



(7.) Eadicle 7 mm. long, card affixed to the back : after 9 h. 

 the terminal part of the radicle deflected in the plane of the 

 bean 20° from the vertical, away from the card and in opposition 

 to Sachs' curvature. After 22 h. 30 m. this part of the radicle 

 had become straight. 



(8.) Eadicle 12 mm. long, card affixed almost laterally: after 

 9 h. deflected laterally in a plane at right angles to that of the 

 bean between 40° and 50° from the vertical and from the card. 

 In the plane of the bean itself the deflection amounted to 8° or 

 9° from the vertical and from the card, in opposition to Sachs' 

 curvature. After 22 h. 30 m. the extreme tip had become 

 slightly curved towards the card. 



(9.) Card fixed laterally : after 11 h. 30 m. no effect, the 

 radicle being still almost vertical. 



(10.) Card fixed almost laterally: after 11 h. 30m. deflected 

 90° from the Tertical and from the card, in a plane inter- 

 mediate between that of the bean itself and one at liglt 



