SURVEY IN SOUTH CAROLINA. 
The ponds examined in South Carolina were those of Parr Shoals 
and Stevens Creek. Their conditions will be noted only as they differ 
from those of the ponds alread} 7 reported on. These ponds came to 
our notice in February, 1915, when, at the request of the health 
officer of South Carolina, a physical survey was made of them by 
Le Prince and Carter. The object of the surveys was to assist the 
health officer in determining what measures were feasible for the 
control of the production of malaria. Certain recommendations to 
this end were made to the health officer in both cases and copies 
furnished the power companies. 
PHYSICAL CONDITIONS. 
There were certain peculiarities common to both of these ponds. 
They were both constant level ponds, the contour of flowage being 
very close to the lowest allowable limit of the pond. This last was 
determined by the War Department, which required that the water 
should pass over the dam. In neither was wave action fully efficient. 
Stevens Creek was a long, very narrow pond with trees on the banks 
protecting it from winds and, where broad enough for wave action 
to be efficient, was extended in woods and brush. Only in the lower 
quarter was wave action efficient. The Parr pond was broad enough, 
but the existence of wooded islands—some submerged and some not— 
an old railroad embankment, and much large timber and smaller 
growth partly submerged, as well as wide expanses of shallow water, 
reduced the effect of wave action over much of its bank to a mini¬ 
mum. In some places it was good. Both contained many partially 
submerged woods and fields of saplings—pine and hard 'wood. 
These were dead or about to die, and as they died would rot and fall 
into the water, making drift and floatage. In both large collections 
of drift existed anchored away from the bank. 1 On one of them, in 
Stevens Creek, a man could walk about. Weeds were growing on 
them and in them mosquito larvae might develop. In all these things 
they were alike—the conditions being intensified in Stevens Creek. 
In one thing they differed. Minnows were fairly abundant in the 
Parr pond, especially Gambusia. but were rare in Stevens Creek. 
Both were full of carp. Also such freshet rises as occurred made 
1 These are called “ hammocks ” in this county; also “ floating islands.” 
