Evaporation of Water in Inland South Africa. 
289 
EVAPORATION - THE. OBSERVATORY BULAV^^YO 
UAT. 20°09 l.S. l.ON&.28''3fe 3 E. AUT 4460fT. 
OBSERVATIONS FOR 1917. 
1917. 
EVAPORATIOM 
INCHES. 
VW 1 IN Xj 
MEAN MILES 
PER DIEM. 
iVi II. AH 
TEMPERATURE 
REUAT IVtl 
MUM IDITY 
DEnciEHcy 
or 
Wt-t-ZVl ) V t- 
HUM\D\TY 
lOO - M- 
tyic.>\N muri i nui 
EVAPORATION 
IN \NCHE.S PER 
I^DEFlctEHcY Of^ 
RELATIVE. 
HUMIDITY. 
mt-AN JJ/\IS.T 
E VAPO R AT ION 
IN IMCHES 
r*En IVoUtrlCltnCrT 
or REl-ATIVE. 
WOIVl ID ITY. 
JAN. 
6 42. 
178 O 
72 
28 
•0073963 
FEB. 
6 -4-9 
l7SO 
7o3 
66 
34 
-190882 
MAR. 
& Zl 
2074 
69 
31 
•200323 
•O0iyH>4o 
APR. 
5 19 
!50-6 
65 3 
73 
27 
•\92222 
•O0fo4074 
MAV. 
3 8S 
l3b-8 
60 7 
75 
25 
■(53ZOO 
•0043413 
JUN. 
4-08 
HI 4 
59! 
57 
43 
•0S48S4 
■003\fo28 
JUL. 
4 1^ 
\Z7 7 
573 
6i 
33 
M0fc\54 
•OO 34243 
AUG. 
5 S3> 
Zid-A- 
fcO-7 
66 
34 
•\S6470 
•0O50474 
SEP. 
7 37 
241 5 
6b 6 
64 
36 
•204722 
•0068Z4O 
OCT. 
9 51 
215- 1 
738 
45 
SS 
•>7Z909 
•0055777 
NOV. 
80I 
2048 
72.8 
6S 
37 
•2lt)486 
■007Zlfe2 
DEC. 
S>7 
193.2 
6&-4 
83 
17 
•304118 
•0098103 
MEAN- 
180-5 
65 
3S 
•0056313 
TOTAU 
7194 
2-055429 
Table 6. 
EVAPORATION - UNION OBSERVATORY -JOHANNESBURG • 
LAT. Se'-ll.t. LOIS G. 28° 4-5. E. ALT. 5924 Fr 
SUMMARY OF OBSERVATIONS FOR PERIOD OF FIVE YEARS. 
Mfc'AM ANNUAL 
TEMPERATUflE 
YEAR 
EVf^PORATIOM 
TOTAL mCHES 
P£RAN«UM, 
WIND 
MEAN 
Z>IEM. 
Vwcw -«■ mm 
Peaces. F. 
MCAHAHHUALi 
RELATIVE 
HUMIDITY 
MEAMAMKHIM. 
nEFICIEHC.< 
OP 
RELATIVE 
HOM miTV 
lOO— W. 
MEAN ANNUAk. 
E>'APoWA-noN 
»H INCH&S,PER 
rl'a Deficiency of 
OP REL-A-nvE. 
MEAN ISAiUV 
EVAPORATION 
IN »ncme;s per 
t7o OEPICIEWCY 
or RELATIVE 
MOt»n I13ITV. 
1914 
1915 
1916 
1917 
MEAN OF 
FIVE YEAR 
3 
6855 
661Z 
5560 
6176. 
3IT2. 
27M 
2796 
2740. 
282 08 
60-27. 
6074. 
5955 
6024. 
5^08. 
59772 
5628. 
5818 
6000 
5255 
63 03. 
5800-^. 
^Z72. 
41-82 
4000 
4747 
3637 
41-936. 
1567932. 
I 581062. 
1390000. 
1-301032 
1-^61726 
K60337. 
•00^2957. 
0045317 
0038082 
0055644 
0040047 
•0040009 
Table 7. 
