Till-; .Mi:i>Ki.\.\i. si-Ki.Ncs oi' sdrrii afkka. 539 



is alkaline in reaction, and contain.s free sul])huretle(l hydrogen, 

 bnt the amonnt has no[ been estimated. 



13. Goa Geyser. 



The tloa geyser (16° 39' South Lat., 27° 20' East Long.), 

 Xorthern Rhodesia, rises through granite, and embraces several 

 springs with a maximum temperature of 63°C, and a minimum 

 of 26" C. The springs are surrounded by a deposit of siliceous 

 and partly calcareous pulverulent sinter. The total daily yield 

 of all the springs is 337,000 gallons. Free sulphuretted hydrogen 

 is evolved, but the amount has not been determined. The eyes 

 of the various springs lie in a depression 400-500 yards long and 

 150-200 yards wide. The owner of the farm on which the spring 

 is situated (Muckle Nuek, near Chpma Station), informs me 

 that he only knows of one case of a rheumatic patient having 

 sought and obtained relief at the s])rings. 



Most of the geological data about the two geysers were 

 taken from the paper of D. Ferguson, " The Geysers or Hot 

 Springs of the Zambesi and Kafue Valleys, Proceedings of the 

 Rhodesia Scientific Association, vol. iii, hj02. 



14. Koiibad. 



On the farm Koubad, on the Pivaan River, District Utrecht 

 <>r X'ryheid, 20 miles north-east of the township of Vryheid, 

 there are two springs, one on the bank of the river with a tem- 

 perature of 105° F., and a cold one about 300 yards from the 

 river. Both are much frequented during the winter months 

 by the farmers of the surrounding districts. No provision exists 

 either for bathing or for accommodation. In the original report 

 the springs, which are very similar chemically, are compared to 

 those of Uriage, Aix-la-Chapelle and Bagnolles, and it is sug- 

 gested that by aeration with carbon dioxide the water might 

 become a useful table water of the character of Giesshubler 

 Sauerbrunn. The gas emanating from the hot spring was 

 found to consist of : 



Per cent. 



Carbon dioxide 7.39 



Oxygen 0.65 



Nitrogen 91.96 



Tables of h)X Equivalents. 



Hot Sl^riiu/ (Analysis by Smite dn Mont). 



Cations. Anions. 



Na 0.285 CI 0.108 



K 0.015 SO^ 0.045 



Mg 0.005 ^0,1 o. 1 53 



Fe 0.0005 



Al o.oIt 



Total 0.3205 I'otal 0.306 



