' 
Do the Mining Operations affect the Climate of Kimberley? 9 
Ai eesb Ja 
RELATIVE THERMAL PROPERTIES OF BuiuE-GROUND AND RED 
Sanp. MEAN VALUES. 
A.—RaDIATION TEMPERATURES AT 3 INCH ABOVE SURFACE. 
1898. MINIMUM. VIII. XIV. | XX. 
Blue. | Red. Blue. | Red. Blue. | Red. Blue. | Red. 
July 4th-31st........ 2350) 22;9) 29:9) 1) 29-5) | 6G:9 | Ga-7. | esol eo4:2 
HNMUI AUS Gise wcities so ea) ot si 32°7 | 30:2 | 42°6 | 40°8 | 84:9 | 83:1 | 461 | 48-2 
September Ist-17th ..| 35°3 | 32:1 | 47°8 | 46:0 | 89:2 | 85:7 | 50°5 | 47°3 
September18th-30th..| 39°5 | 37:1 | 60°5 | 61-2 | 93°8 | 91.4 | 54:8 | 51°5 
July 4th—Sept.17th ..| 30:3 | 28:0 | 39:2 | 379 | 79-4 | 774 | 43:0 | 408 
| VIII. XIV. 39K, 
Blue. | Red. Blue. | Red. Blue. | Red. 
° a Oo oO fe} 1e} 
BrutllyrA Gln ONG Gees it oi tees ece as 6 Sie leh Soyer 33:0 | 31:8 | -63°1° | 65°3 | 42°4 | 40°6 
JETOFER DIS Gs. naive 9 ie ies Eye ee eee 44-3 | 43:5 | 81-7 | 83°7 | 55:9 | 53°38 
September ASG lad ieee ate av siaiera oreve cok 50°4 49°5 90°71 91'8 61:9 591 
September 18th-30th .............. 60°8 | 62:2 |100°0 |101°3 | 69°8 | 66°3 
July 4th-September Mebane eek eee oor 41°6 40-7 767 788 522 499 
C.—CoMPARATIVE KLEMENTS OF INFLUENCE. 
July. August. September. 
Hours. Hours. Hours. 
Amount of Cloud (0-10)* ........ 0-6 IIT ~ Aeg 
Duration of Sunshine +... ...... 2984 = 92% 297 =86% 3013 = 84% 
Mean Maximum Air Temperature 65°6° 72°5° 78°0° 
Mean Minimum do. reves 32°7° 38°5° 422° 
* From observations taken at VIII., XIV., and xx. civil time. The mean amount 
of cloud for the year is about 2°5. At Cordoba it is 4°5, and at Adelaide 4:8. 
t+ As recorded by the Jordan Photographic recorder. According to a paper 
recently published in the Quarterly Journal of the Royal Meteorological Society 
by Mr. R. Curtis, describing some comparative observations made in England 
between the sunshine recorded by this type of instrument and that by the 
standard Campbell-Stokes burning recorder, it is claimed that the latter records 
the greater amount. With a sky in which cumulus prevails this would always 
be the case, because the record of the burning recorder is not a series of points, 
but a succession of large overlapping images—isolated clouds thus not receiving 
their true and sufficient angular dimensions on the trace. The record of the 
photographic recorder, on the other hand, is a series of narrow transverse lines. 
