TIURRELL : THE COMPOSITION OF SOME MALHAM WATERS. 47 
Table I. 
Constituents in Grains per Gallon (parts per 70,000). 
Malham 
Tarn Sluice 
Gate. 
Aire Head 
Spring. 
Smelt 
Mill Water 
Sink. 
Malham 
Cove, 
Date when sample was taken y 
Temperature of air 
Temperature of water ... 
Silica (SiOo) 
Sulphuric Anhydride (SO 3 ) 
Nitric Acid (HNO J 
Nitrous Acid (HNO2) 
Phosphoric Acid (P2O5) | 
Chlorine (CI) 
Ferric Oxide (Fe.^Og) 
Lime (CaO) 
Magnesia (MgO) 
Sodium (Na) 
Ammonia (NH5) ... 
Albuminoid Ammonia ... 
Behaviour of solid residue on ) 
ignition ... ... j 
August 6 th, 
1899, 
12.35 p.m. 
65 0° F. 
6 10° F. 
0- 213 
1- 281 
None 
None 
None 1 
0-665 
0 030 
3-143 
0-169 
0-433 
0-005 
0-006 
Blackens |^ 
August 5th, 
1899, 
6.20 p.m. 
62-0° F. 
48 -5° F. 
0- 2-24 
1- 050 
0-100 
None 
Minute 
trace 
0-700 
0 030 
6-258 
0-403 
0-456 
0-007 
0-006 
Does not 
blacken 
August 6th, 
1899, 
12.5 p.m. 
67-0° F. 
64-0° F. 
0-139 
2-049 
None 
None 
Minute 
trace 
0-700 
0-009 
6-839 
0-841 
0-456 
0-003 
0-018 
Blackens 
Augu.st 6th, 
1899, 
3.10 p.m. 
46-0° F. 
0- 536 
1- 9-29 
0-150 
None 
Minute 
trace 
0-700 
0 0-23 
6-652 
0-608 
0-456 
0-002 
0-005 
Does not 
blacken 
Table 11. 
Dissolved Saline Constituents in Grains per Gallon 
(parts per 70,000). 
Malham 
Tarn Sluice 
Gate. 
Aire Head 
Spring. 
Smelt 
Mill Water 
Sink. 
Malham 
Cove. 
Silica (SiO.J 
Calcium Nitrate (Ca2N03 ) 
Calcium Carbonate (CaCOg) 
Calcium Sulphate (CaSO^) 
Magnesium Carbonate (MgCOg) 
Sodium Chloride (NaCl) 
Ferrous Carbonate (FeCO 3 ) 
Total dissolved matter by evap- 
oration dried at 1 10° C. 
0-213 
None 
4-008 
2-178 
0- 353 
1- 097 
0 043 
0-2-24 
0- 130 
9-778 
1- 785 
0- 843 
1- 155 
0-043 
0- 139 
None 
9-646 
3-483 
1- 759 
1-155 
0013 
0-536 
0- 195 
9-344 
3-279 
1- 272 
1-155 
0-033 
7-892 
13-958 
16-195 
15-814 
8-176 
14-280 
16-940 
16-520 
