TRANSPIRATION STUDIES. 
TasLe 3—Continued. 
19 
Dew-point. Temperature. Relative humidity. 
Date. Time. 
Plant, | Atmom-| air, | Plant. | Atmom- | gir, /Plant.| Atmom- | air. 
1911. &C, os a Of oF, °F, oF. | pict p. ct, p. ct. 
Mar. 11..] 54 20™p.m...| —3.5 —3.5 —3.5 59 59 59 28 28 28 
Mar. 12..| 6 45 a.m...| —7.5 —7.4 —1.5 40 42 40 40 37 65 
7 20 am...{| —2.0 —2.0 —2.0 42 42 42 57 57 57 
7 55 am... 3.0 2.5 1.5 58 56 56 47 49 37 
8 33 a.m...| —1.0 1.0 —1.0 78 77 78 18 17 18 
9 30 am...) —1.5 —2.0 —1.5 80 81 80 15 14 15 
9 55 am...| —1.5 1.5 -1.5 80 80 80 15 15 15 
11 00 am...| —3.0 —2.5 —3.0 85 85 83 12 12 14 
11 25 am...| —3.0 —3.0 —3.0 84 84 84 12 12 12 
12 35 p.m...| —5.5 —4.8 —6.0 84 85 84 10 11 9 
110 p.m...| —7.0 —7.0 —7.0 85 85 85 9 9 9 
2 10 p.m...} —4.5 —5.5 —7.0 89 88 87 9 9 9 
2 30 pm...) —7.5 —7.5 7.5 86 86 86 9 9 9 
3 30 p.m...| —7.5 —6.5 —4.5 86 86 84 9 9 9 
3°45 p.m...) —4.5 —4.5 —4.5 82 82 82 10 10 10 
4 45 p.m...| —8.0 —7.5 —3.0 80 80 78 9 9 15 
5 15 p.m...| —3.0 —3.0 —3.0 72 72 72 18 18 18 
Mar. 18..| 7 25 a.m...| —1.3 —3.0 2.8 60 60 58 32 28 45 
8 05 a.m... 2.0 2.0 2.0 60 59 60 41 42 41 
9 25 am... 7.0 6.0 1.0 70 68 70 40 40 27 
9 30 am... 0.8 0.8 0.8 70 70 70 27 27 27 
10 55 a.m...| —5.0 —4.5 0.6 79 80 79 13 12 20 
11 15 am... 0.5 0.5 0.5 81 81 81 18 18 18 
12 35 p.m...| —5.0 —4.8 —1.8 85 85 83 10 9 14 
1 00 p.m...| —2.0 —2.0 —2.0 84 84 84 13 13 13 
2 00 p.m...} —5.0 —5.2 —3.0 90 90 89 9 9 10 
2 20 p.m...| —3.0 —3.0 —3.0 90 90 90 10 10 10 
3 20 p.m...| —7.0 —5.5 —2.5 85 87 85 9 9 12 
3 45 p.m...| —0.5 -0.5 —0.5 79 79 79 18 18 18 
4 45 p.m...| —3.5 —5.0 1.0 82 80 76 13 12 22 
5) re Bee : 
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Fic. 6.—Graphs for transpiration of c, leafless branch of an 
adult tree, March 12. Exp. III. 
