19 
Date when Measurements 
Number of 
SDecimens 
Mean 
Mea surement. 
were taken 
measured. 
mm. 
September, 1917 
102 
135-30 
September, 1918 
40 
132-87 
October, 1914 
57 
143-20 
October, 1920 
46 
134-02 
December, 1913 
6 
146-67 
Januarj^ 1915 
60 
145-92 
Januarj^, 1917 
187 
141-59 
Jantiary, 1918 
224 
128-43 
January-February, 
1920 
176 
144-74 
February, 1919 
65 
146-81 
Sixth Year. 
March, 1916 . . 
15 
156-16 
March, 1918 . . 
69 
141 
20 
April, 1914 . . 
2 
155 
00 
April, 1915 . . 
5 
147 
50 
May, 1917 . . 
401 
148 
98 
May, 1920 . . 
25 
150 
70 
June- July, 1919 
34 
156 
33 
July, 1915 . . 
18 
146 
67 
August, 1919 
29 
150 
95 
August-September, 
1910 
15 
158 
83 
September, 1917 
150 
149 
33 
September, 1918 
46 
152 
08 
October, 1914 
31 
157 
02 
October, 1920 
2 
145 
00 
January, 1915 
16 
160 
63 
Jantiary, 1917 
31 
158 
95 
January, 1918 
43 
140 
40 
January-February, 
1920 
26 
161 
16 
February, 1919 
32 
Seventh Year. 
151-10 
March, 1918 . . 
I 
162-50 
April, 1915 . . 
1 
172-50 
May, 1920 . . 
2 
170-00 
June- July, 1919 
1 
147-50 
August, 1919 
2 
155-00 
August-September, 
1916 
1 
177-50 
February, 1919 
6 
162-50 
Eighth Year. 
August, 1919 
] 
162- 
50 
