1912] LIVINGSTON & BROWN—TRANSPIRATION 323 
these occurred, the latter being simply numbered from 1 to 24, are. 
there given, together with the corresponding maximum rate of 
evaporation and the hour of its occurrence. 
TABLE III 
AUGUST 28-29, I9gI0 
EVAPORATION PERCENTAGE OF MOISTURE 
Physalis Maclura Covillea Prosopis 
Period on ke Be pe On basis |O7 basis| On basis ragh On basis On basis On basis ior 
substance weight substanee paar gibabgaee sola substance pom 
(A.M.) 
6- z 0.82 7 | 778.5 | 89 | 237.2 | JO | 116.7 54") 380.7 1. 62 
7 eee | meas ery a ee teas Fis peice ie Kee - 
8-9) 2.87 9 | 736.7.| 88 | 224.1 | 69 | 127-4] 56 | 145-3 | 59 
rt 3. 77 See ea hate don ore ries aes eee Gaerne Seen ee es 
TO-Ir | 4.51 ar} 605.9: | BOest a. ee ee ees ee ee 
EY-49 | 4.02 1. OP eae ee ee 
(P.M.) 
12-1 | 5.08*| 1 | 566.2 | 85* | 186.6] 65 | 125.1 | 56 | 144.3 59* 
Ta OF OP eae ee ee ae : 
a 3 13-93 3. 695.9 | 86:1 293.8) Os" bee at a 
3- 4 | 3.69 aie Ere ay ae .. 3303 | 58 | 168.4) 62 
4-— § | 2.13 5 78056 OO | isc gd tales Pe a ee oe 
B= 6 1 2.86) oa Pkcee | fn de ee ee 
On 7) a5 yl Osa) Blasi) Re Pee 
PO BBO a a TEs eee, Serr ie eae oe ee 
8- 9 | 0.90 9 72. % 89 186.0 1 OS 4 at es 
MLO | OC. 00 re bora Be een es Me On Ne Pe ek ne 
to-13 | 0.57 |: 13 | 965.81) OB. 4 civil ee ee 
TIME? | 0.40 [oe eee ce ee eee 
(A.M.) 
12-1 | 0.74 t | 696.44 567.) cre Pe eee ee 
Te 0,39 fo ea ee er ee oom 
2- 3 | 0.41 3 905.6) BOF eee | ke reer ee eae 
Bo A] 0.33 | ee ee ee ee 
a 5 9-33 749-4 |) BB ns dS a ea ee 
B= 601 Oo Bec oo onic ee ees eh ae eee ee oe ne 
6- 7 | 1.48 5 | gegie i BEF oe. Sie ee: Cee ee 
Physalis is the only form which was tested on different days, 
with different conditions of evaporation, and the data therefrom 
are the most instructive of our series. In the first two cases this 
form showed the greater variation in water content with the 
higher evaporation maximum (5.08 cc. per hour, table III), 
and the smaller variation with the lower evaporation maximum 
