208 
PHYSIOLOGY: H. SHAPLEY 
PROC. N. A. S. 
indicates that during that observation ants travelled faster toward the 
nest than away. A positive value of (M - m)/0.0l7; indicates a greater 
average speed for the larger workers. The percentage differences are 
grouped in table II in order of decreasing temperature. 
TABLE I 
Observations of Temperature and Speed 
9;H 
. in 
1> 
0 
Dat 
(191 
Tim 
(P. s. 
Tern 
(Cen 
Secor 
and P 
V. ^ 
1 q 
1 q 
° 
Remarks 
L lA 
May,25 
11:20 A.M. 
34°, 
22 
6.9 ± 
0.1 
4.35 
— 4 
_ 1 
L 2A 
11:35 A.M. 
30, 
18 
9.8 
0.3 
3.05 
5 
4- 4 
vJllcltJ.CvJ. WlLil Cdl vi LItJctX VJ. 
L 3A 
11:46 A.M. 
35, 
21 
5.9 
0.1 
5.08 
— 5 
— 3 
Sunshine 
L12A* 
5:25 P.M. 
21, 
20 
13.4 
0.3 
2.23 
4-13 
-V- 6 
L13A 
8:35 P.M. 
16 
18 
22.1 
0.2 
1.36 
4- 4 
2 
Dark 
L16A 
10:38 P.M. 
15.5 
17 
23.5 
0.5 
1.27 
4-17 
1 
Dafk 
L17A* 
26 
1:28 A.M. 
14.5 
15 
27.3 
0.7 
1.10 
2 
Dark 
L20A 
4:00 A.M. 
14.5 
18 
27.2 
0.6 
1.10 
4- 6 
3 
Ticiwn Kpcrinniti cr 
.l_yCtVVil L./^glli-IXl±Xg 
L22A 
0:55 P.M. 
38.5 
42 
4.55 
0.05 
6.60 
9 
4- 7 
.^1 1 Ti Q ri 1 n P 
L23A* 
27 
2:25 A.M. 
17, 
19 
23.5 
0.4 
1.28 
4- Q 
A- 5 
Dark 
L25A* 
10:55 A.M. 
33.5 
26 
6.3 
0.1 
4.77 
4- 8 
0 
VJ LlXXOXAlllV- 
L27A* 
11:25 A.M. 
31, 
24 
9.8 
0.2 
3.06 
— 4 
4- 1 
Shaded with cardboard 
L28A* 
11:40 A.M. 
37, 
22 
5.29 
0.08 
5.67 
4- 6 
4-10 
VJ IXXXOlllXXV^ 
L29A 
4:47 P.M. 
26, 
24 
11.7 
0.2 
2.56 
1 
4- 2 
X 1 OXXCl\Xv/ VV 0 
L31A 
5:24 P.M. 
23.5 
18 
13.1 
0.2 
2.29 
8 
7 
ClouHv 
L32A 
6:15 P.M. 
22, 
22 
13.8 
0.3 
2.17 
13 
4- 8 
nTwiliQ^Tit oloiirJv 
L33A 
8:15 P.M. 
20, 
20 
16.1 
0.2 
1.86 
6 
0 
Dark 
L35A 
11:42 P.M. 
18, 
24 
17.6 
0,5 
1.70 
4-12 
4- 2 
T)nrt two Vioiirs aftpr 
rain 
28 
9:22 A.M. 
20, 
24 
14.7 
0.3 
2.04 
0 
7 
Cloiidv 
June, 4 
11:24 A.M. 
36, 
22 
5.43 
0.0§ 
5.62 
6 
1 
^IITIQrllTIP 
vJ Lill oil IXIC 
T ^QA 
11:40 A.M. 
38, 
20 
4.95 
0.07 
6.06 
2 
4- 8 
.^IITlQnltlP 
vJLUlolllllC 
T 40A 
11:53 A.M. 
36, 
21 
5.43 
0.13 
5.52 
3 
3 
'"^ViciHprl wifVi o"l 
OlldUCvl WlLll ^Idoo 
T 41 A 
0:02 P.M. 
33, 
20 
6.95 
0.13 
4.32 
3 
1 
vJilclvldu. w 1 Lii v^cix vx 
T 44A 
4:40 P.M. 
25.5 
25 
10.2 
0.2 
2.94 
4- ^ 
0 
T^fPP-cVl Q Ci'W 
J. ICC olld^-l'wJVV 
L46A 
5:11 P.M. 
24.5 
20 
11.3 
0.2 
2.65 
+ 10 
+ 12 
Tree shadows 
L47A 
10:55 P.M. 
17, 
20 
18.6 
0.4 
1.61 
+ 8 
— 2 
Dark 
L48A 
5 
9:20 A.M. 
19, 
26 
18.5 
0.4 
1.62 
— 9 
+ 7 
Shadow of wall 
L50A* 
10:05 A.M. 
22, 
19 
13.9 
0.4 
2.16 
—19 
— 2 
Shadow of wall 
L54Y 
Dec. 21 
1:40 P.M. 
14, 
20 
29.6 
0.9 
1.01 
+ 12 
+ 14 
Tree-shadows 
L56Y 
2:16 P.M. 
14.5 
24 
25.8 
0.4 
1.16 
— 8 
+ 19 
Weak sunshine 
L57Y 
3:44 P.M. 
12.6 
20 
39.0 
1.1 
0.77 
— 6 
+ 12 
Tree-shadows 
L58Y 
4:36 P.M. 
10.3 
20 
46.9 
1.6 
0.64 
+27 
+ 4 
Weak sunshine 
L59Y 
6:15 P.M. 
9.0 
16 
68.1 
2.6 
0.44 
+ 11 
+ 15 
Dark 
L60Y 
22 
11:42 A.M. 
14.5 
20 
27.0 
0.8 
1.11 
—20 
+ 6 
Tree-shadows 
L61Y 
11:56 A.M. 
14.5 
20 
28.5 
1.0 
1.05 
—25 
+ 15 
Tree-shadows 
L62Y 
0:47 P.M. 
15.5 
22 
25.4 
0.8 
1.18 
—14 
0 
Tree shadows 
L63Y 
3:40 P.M. 
18.0 
21 
25.9 
0.8 
1.16 
— 9 
+ 9 
Mottled shadow 
L64Y 
23 
2:47 P.M. 
18.6 
20 
20.2 
0.5 
1.48 
— 2 
+ 2 
Weak sunshine 
L65Y 
4:08 P.M. 
18.5 
20 
20.8 
0.6 
1.44 
+ 13 
+ 3 
Weak sunshine 
L66Y 
24 
7:15 A.M. 
12.5 
20 
38.7 
0.9 
0.77 
— 4 
+ 5 
Shadows at sunrise 
