120 
Bateson —On the change of shape 
Sambucns nigra , the Elder. 
The results are similar to those obtained with the Sun- 
flower. The pith sometimes gets narrower at once, but 
usually expands before becoming narrower. 
ELDER PITH. GAIN OR LOSS IN THICKNESS GIVEN IN 
HUNDREDTHS OF A MM. 
Experiment 4. 
June 6, 1887. 
Diameter at end of experi- 
ment = 4- 2 5 mm. 
Experiment 5. 
May 24, 1887. 
Diameter 5.20 mm. 
Time. 
Time. 
12.3 p.m. 
In air. 
10.40 a.m. 
In air. 
12.4 „ 
- 0.5 
.42 » 
— 1-0 
water added. 
•43 » 
o-o 
•5 » 
+ 0.5 
•49 » 
0-0 
-6 „ 
- o-5 
water added. 
• 7 
- 0.5 
•50 
0-0 
.8 „ 
— 1-0 
•52 ,» 
+ 1-0 
.10 „ 
- 05 
+ 0.5 
.12 „ 
- i-5 
•53 » 
+ o*5 
14 » 
— 1-0 
•56 >* 
+ 1-0 
•25 » 
— 2-0 
•59 » 
+ 0.5 
•29 » 
0-0 
1 1-5 ». 
- 0.5 
•30 „ 
0-0 
.16 „ 
o-o 
i-5 „ 
— 1-0 
.22 „ 
- 0-5 
•37 » 
o-o 
•43 » 
- 0-5 
12.10 p.m. 
+ 0-5 
•23 „ 
o-o 
3-7 >, 
- i-5 
Results : — Exp. 4. Transverse diameter diminishes, almost at once by 0.08 mm. 
= 1-9 per cent. 
Exp. 5. Transverse diameter increases by 0-035 mm. -•= about 0.7 per 
cent., then diminishes by 0-025 mm. = about 0-5 per cent. 
