féet below the level of the lake surface, 
@ boring was made toa a depth of 8.25 
feet, which revealed nothing but drift 
deposits, similar to station 1-b. 
The most interesting results were ob- 
tained from the borings at the north end 
(toward Logan’s spring), and on 
the west side (toward Hart Park), at 
both of which stations the underlying 
soapstone rock was reached. Each of 
these borings was started close to the 
shore line, practically at the level of the 
lake. 
Station 2, North End of Lake. 
Bog mud | 2.25 ft. 
Sand and clay 5.41 yy 
Sand, clay and pebbles 3-59 “ 
“Hardpan,"’ sand, clay and pebbles TOnt7i 
Soft bluish soapstone ieGp °° 
34.34 
Compact soapstone at bottom. 
At this place the soapstone was there- 
fore struck at a depth of about twenty- 
two feet. 
Station 3.a, West Side of Lake. 
Grass, bog mud and silt 4,58 ft. 
Sand, clay and pebbles Toga) 
Greenish clay (disintegrated soapstone?) 1.67 ‘ 
Soft bluish soapstone 17.75 “* 
34-33 
Compact soapstone at bottom. 
If the greenish clay represents, as it 
apparently does, the disintegated up- 
per part of the soapstone rock, this lat- 
ter is only about fifteen feet below the 
surface at this point. 
These facts prove conclusively, what 
we had always inferred, that the bas- 
in of the lake is due, primarily, to a 
trough in the underlying soapstone with 
its longer axis in a northeast and 
southwest direction, whicn has been 
dammed by a barrier of drift material 
at the southern end. They also indi- 
cate, what had not occured to us before, 
that the barrier at the northern end is 
not wholly composed of drift, but has as 
its basis an under lying spur or ridge 
‘of soa Stone. It is unfortunate that 
the boriffes-did riot determine the level 
12 
of the soapstone surface in the deeper 
parts of the basin. 
Novrs.—The borings at stations 1, l-a, 
and 3 were abandoned at depths of 7 ft. 
6.75 ft. and 14 ft., respectively, on ac— 
count of striking bowlders. The records 
in regard to these are therefore not in- 
cluded. 
Lake water collected July 17, 190}. 
Pts. per Grains 
100,000 per gal. 
Appearance, turbid (suspended organic matter) 
Color, yellowish. 
Odorx at too Far., marshy 
Chlorine ¥.2425 0.7206 
Phosphates, none 
Nitrogen in nitrites, none 
Nitrogen in nitrates, none. 
Free ammonia 0.9910 0.0395. 
Alb. ammonia 0.044 0.0255 
Hardness before boiling, 2 
Hardness after boiling, 
Organic and volatile mat- 
ter, (loss on ignition) 4.5 2.61 
Mineral matter, not vol- 
atile 32 1-856 
Total solids, by evapora— 
tion eal 4.465 
Lake water collected Nov. 20. 1903, after 
two weeks of fine weather, 
Grains per gal. 
Chlorine 0.80 
Free ammonia -co05 
Alb. ammonia 006: 
Hardness, 134 
Organic and volatile,(loss on ignition) —2.59 
Inorganic residue 2.06 
Total solid residue 4.65 
Calcium carbonate 1.45 
Calcium sulphate, trace 
Tron, trace 
Magnesia, none 
Lake water collected Dec. 7, 190}. 
Pts. per Grains 
109,009 per gal. 
Calcium carbonate 
+30 +17 
Magnesium carbonate .60 35 
Calcium sulphate 1.80 1.05 
Sodiim and potassium 
chlorides .8> 46 
Magnesium chloride .29 a7 
Calcium chloride ,12 .07 
Iron oxide, (Fe 2 03) 14 .08 
Alumina “19 It 
Silica -4t +24 
Total mineral matter 4.65 2.710 
Total organic matter 2.20 1.23 
Total solids 6.85 3.0) 
Setar «> 
