SCIENCE. 
67 
1880. 
Grains in an Imp. Gal. 
Constituents. 
Total solid conslituenls 
After incineration 
Lime (CaO)... 
Sulphate of lime (Cao, SO a . 2 HO) 
Carbonate of lime (CaO, C 0 2 ) 
Bicarbonate of lime (CaO, 2 Co 2 ) 
Magnesia, (MgO) 
Chloride of Magnesium (Mg Cl 2 ) 
Carbonate of Magnesia 
(5 MgO, 4 Co 2 , 6HO) . . 
Chlorim (Cl.) . . . .'. 
Chloride of Sodium (Na Cl) 
Soda (Na^O) 
Sulphuric Acid (SO a ) 
Sulphate of Sodium (Na a O, SO :< ) 
Iron (Fe O) 
Silica (Si 0 2 ) 
Carbonic Acid (Co 2 ) 
Organic and Volatile matter 
Newark City Aqueduct. 
Public Well, 
cor. Orange and 
Broad Streets, 
Newark. 
March. 
Public Well, cor. 
Ferry and Con- 
gress Streets, 
Newark. 
March. 
Balbach’s Arte- 
sian Well, 
Newark. 
March. 
Newark 
Driven 
Well. 
June. 
New York 
Driven 
Well. 
June. 
March. 
June. 
3 - H 7 
2.377 
1-357 
None. 
2.220 
6.688 
22.277 
17.673 
7 - 150 
6.016 
9.270 
36.929 
21.312 
6.842 
6.016 
8.717 
125 833 
92.849 
40-953 
120.346 
3-155 
49.782 
31-434 
1.225 
6.940 
6.052 
7.940 
4-396 
8.665 
3 - 3°4 
3.162 
1.815 
5.824 
Ttace. 
0.452 
Trace. 
Trace. 
Trace. 
2.468 
5.981 
8.486 
13.901 
12.187 
9.865 
n.188 
0.21 1 
0-379 
0 636 
O.318 
1-245 
3-392 
5-596 
5-939 
9 794 
0 845 
1 398 
6-374 
8.215 
4 - 3 I 5 
5- 096 
None. 
2.798 
2.798 
55-974 
Trace. 
Not estimated 
Tracp. 
Not estimated. 
Trace. 
Not estimated. 
T race. 
Not estimated. 
1.293 
0705 
o -957 
4.701 
7.199 
7-374 
1.736 
4-396 
6.446 
0.378 
1-395 
12.408 
None. 
l88o. 
Grammes in a Litre. 
Constituents. 
Newark City Aqueduct. 
Public Well 
cor. Orange and 
Broad sts., 
Newark. 
March. 
Public Well 
cor. Ferry and 
Congress sts., 
Newark. 
March. 
Balbach’s Arte- 
sian Well, 
Newark. 
March. 
Newark 
Driven 
Well. 
June. 
New York 
Driven 
Well. 
June. 
March. 
June. 
Total solid constituents 
0.0450 
0.0340 
0.0194 
None. 
0.0346 
0.0956 
0.3184 
0.2526 
0.1022 
0.0860 
0.132s 
0.5278 
0.3046 
0 9780 
0.0860 
0 1246 
1.7884 
1 . 3270 
0-5853 
I.7200 
0.0451 
0.7115 
0.4485 
Lime (CaO) 
Sulphate of lime (CaO, So.,, 2HO) 
0.0176 
0.0298 
0.0096 
0 0992 
0.0865 
0-1135 
0.0692 
0.1236 
Bicarbonate of lime (CaO, 2CO-) 
0.0471 
0.0451 
0.0259 
0.0830 
Magnesia (MgO) 
Chloride of Magnesium (MgCL) 
Trace. 
0.0064 
0.0050 
0.0105 
Tiace. 
Trace. 
Trace. 
00353 
0.0855 
5 MgO, 4 C 0 2 , 6 HO).. 
Chlorine (Cl) 
Chloride of Sodium (NaCl) 
Soda (Na..O) 
O.OO3O 
O 0050 
0.0090 
0.0086 
0.0035 
0.0175 
0.0485 
0.0800 
O.0849 
O.I4OO 
O.OI2I 
0.0200 
0.1213 
0.1987 
O.1742 
0.1410 
0.1599 
0.09C9 
0.1172 
0.0616 
0.0727 
Sulphuric Acid (S 0 3 ) 
None. 
O.O4OO 
O.O4OO 
0.8000 
Trace. 
Not estimated. 
Trace. 
Not estimated. 
Trace. 
Not estimated. 
Trace. 
Not estimated. 
Silica (Si 0 2 ) 
Carbonic Acid (CO>) 
0.0185 
O.OIOI 
0.0136 
0.0672 
0.1029 
0.1054 
0.0248 
0.0627 
0.0920 
Organic and Volatile matter 
0.0054 
O.OIO4 
0.1778 
None 
We have been shown a number of photographs copy- 
righted by Mr. Geo. Cumming, of 'this city, entitled, 
‘Studies of the Color Glow, or Rectilinear Spectrum.” 
The original colored line drawings which were exhibited 
in 1879, at the Academy of Design and American Insti- 
tute, consist of geometrical forms drawn in straight 
lines, in many hues of color, forming central globes with 
bright scintillating effects. While the photographs give 
but the form on a much reduced scale without, of course, 
the chief beauty — the blended color-lines— they are curious 
as illustrating the depth of tone obtained by the camera 
from any given shade or tint — light green for instance 
coming out deep black and violet being almost lost in 
the process. The originator has more of an artistic than 
a practical feeling in their conception, and calls his vari- 
ous designs spring, sunset, autumn , sunrise, etc ; his 
idea being to embody a theory of color with pleasing 
effect, rather than to stamp himself as either an artist or 
designer. 
We desire to direct special attention to the meeting of 
the American Society of Microscopists at Detroit, on 
the 17th of this month, presided over by Professor II. L. 
Smith, of Hobart College, Geneva, N. Y. 
The conception of such a national meeting of micro- 
scopists is most excellent, and under such able leadership 
the results of the meeting cannot fail to promote the 
extension of microscopical research, and its elevation to 
the high position it should occupy, as one of the greatest 
aids to our possession of scientific knowledge, the com- 
prehension of the workings of Nature and “ of things 
around us.” 
