p. GrROOM 



25 



board during the absorption of water are true, and not due to increased 

 curvature. This is true of the changes in length between June 22nd 

 and 23rd, and July 1st to 9th. 



Changes in transverse curvature. In like manner Table B iv shows 

 on comparison with Table B i that the measurements recorded of the 

 widths are not determined by the transverse curvatures ; even when 

 there is a considerable difference in the amount of widening of the two 

 ends (June 25th to 28th) this is not associated with any corresponding 

 dift'erence of curvature. 



Table B iv. 



yb . yxb 



yx . y 



Date and times 



VI. 21 

 22 



23 



24 



28 



29 



VII. 1 



13 



Hi 



10.30\ 

 10.45J 



3 1 

 2.50/ 

 11.50) 

 12 J 

 3.5 ) 

 3 / 

 12.301 

 12.20J 

 10 \ 

 10.5 J 

 11.35) 

 11.40/ 

 11.45 I 

 11.57/ 

 11.45) 

 11.50/ 

 11.12) 

 11.7 / 



12.40) 

 12.45/ 

 12.12) 

 12.10/ 

 11.10) 

 11.16/ 



Change of shape 



Concave 



Less concave (tends to straigh- 

 ten) 

 More concave (curves) 



More concave throughout 



(curves) 

 Concave throughout 



Change 

 of width 



Change 

 of width 



Nearly straight 



(straightens) 



as a whole 

 minutely 

 concave, 

 nearly 

 straight 



Practically straight 



Slightly convex (curves) 

 Minutely concave (curves) 

 Definitely concave „ 



Change of shape 



Concave ' 



•122 Less concave (tends to straigh- -128 



ten) 

 •195 Vigorously convex in middle -614 



(curves equally) 

 •463 Less convex (tends to straighten) •I 72 



•104 StiU less convex (tends to -002 



straighten) 

 •005 Minutely convexN (tends to - -005 



straighten) 

 •043 



as a whole •OOO 



•002 Straight I minutely 



f convex, "0 



•007 Minutely convex nearly 



I straight -003 



•015 Nearly straight I -013 



- •OOS Practically straight - ^003 



3 



•586 Became concave (curves more) •631 



•034 Shghtly more concave (curves -024 



more) 

 •058 Concave, about = VII. 13; hence -034 



it straightens shghtly 





