SikhfanS^^ 
SMS 
s? Tin sr^Siq 
dvs'ntery he a ?onc g e had wells dug and all the camp had to drink the well 
rrater The result was very satisfactory. The dysentery P ra ^' call > >s 
anneared and with one or two exceptions the men remained healthy. Only 
afew^naU Malay Settlements existed in the catchment area and care was 
taken to <mt all the water from above the camp. 
Such histories are not uncommon in countries thickly 
orimn 4 ™7e’ of some outbreaks of dysentery though no doubt once 
started human agencies are important factors in t le sprea o msea. 
Of well known organisms common in these waters t>. subtilis, 
B me'aterium, B. violaceous, B. prodigiosus, Sarcina lutea and various 
Coc”'and moulds mav be mentioned. They all grew well at blood hea 
and both B. prodigiosus and violaceous continued to form pigment unde 
that condition B. pyocyaneus was only found once m any o ese 
but^dpes occur in some well waters. Other organisms winch we could not 
identify were common. 
Surface Wells. 
Examinations have been made immediately after taking the sample of 
the water from surface wells in the neighbourhood of the Institute. In sue 
thp number of organisms is of some importance. . r 
Other examinations are of water from wells collected m various parts o 
the State These have been sent by train and delay has occurred sufficient 
for further development of organisms so that the class of organisms present 
al0n< No freafutfonTare taken as regards surface wells beyond making a 
raised ed^e some 2 feet 6 inches round the well which prevents rogs, 
from entering and having the surface of the ground round he well sloped 
from the well to a drain some 6 feet or less from the edge ' f 
surface is usually concreted. These precautions seirvethe P ur P°*® 
Dreventiim water used for bathing, washing utensils, etc., from directly 
funnhm back into the well. Many of the wells are 24 to 30 feet deep and 
the surface of the water is rarely less than 6 feet below the ground in 1 y 
"“The drainage area of such a well is much greater than the small area 
enclosed in the drain and in dry weather may be so cracked and fissu 
that water discharged on the surface and containing surface washings may 
be discharged directly into the subsoil water which supplies the we . 
