EEPOHT OF CHEMICAL LAHOBATORY 
399 
Water from Deer Weees at Khartoum 
The following are some results of examinations of a water from deep wells at Burre, 
the eastern end of Khartoum. These wells were intended to be used as a source of 
the town water-supply, but, as will be seen, the water in its present untreated state 
is not suitalile for the purpose. The wells in question were sunk to a depth of about 
75 metres (one of them to 100 metres), but were only tubed to a depth of about 2‘2 metres. 
A number of analyses of the water were made, but, as the variations were slight, 
the two following will suffice to show its character. 
The figures are in parts per million. 
Date of collection 
J.au. 1st, ’08 
Aljout 2 days 
Jan. 11th, ’08 
Length of continuous inimping before sample was taken 
About n days 
Total solids liy evap. to dryness . . 
26.5-00 
261-00 
FreoTimmonia (NH.,) 
O-.l.^ 
0-02 
“ Albuminoid ” ammonia (NH„). 
0-06 
0-0.58 
Oxygen consumed in 10 min. at 100'^ C. ... 
2 -on 
2-00 
Nitrites (N) ... . 
trace 
trace 
Nitrato.s (N) ... ... . 
0-10 
0-00 
Chlorides (Cl) ... . . 
1-44 
1-40 
Snlphiites (SO4) . 
2-00 
2.21 
C.arbouates (CO 3) . . 
14.3-00 
140-60 
Manganese (Mil) 
0-17 
0-12 
Iron (Pc) . 
1-.33 
1-22 
Calcium (Ca). 
04-31 
04-80 
Magnesium (Atg) 
17-C4 
18-.57 
Pota.ssium (K) . ... . 
.5-74 
.5-01 
Sodium (Na) ... 
7-88 
8-02 
In all cases the water was almost quite clear when it emerged from the pipe, Init 
became distinctly opalescent after even a few’ minutes’ ex)) 0 sure to the air and ultimately 
deposited a small amount of yellowish-red jirecipitate. 
The taste of the water was faintly chalybeate. Its temperature was fairly constant 
at about 29’ C. 
The points specially to be noted in the above figures are the high jiroportion of free 
ammonia, and the presence of nitrites and of iron and manganese in considerable (piantity. 
Deop well 
water in 
Khartoum 
Results of 
analysis of 
the Burro 
wafer 
