45 
THE COMPOSITION OF SOME MALHAM WATERS. 
BY B. A. BURRELL, F.I.C. 
(Bead Xovemher 'Ind, 1899.) 
The waters analysed were those whose flow was investigated 
by members of this Society on the 21st and 22nd June, 1899. 
The only pubUshed analyses of these waters are the partial 
examinations (1) of the Malham Tarn Stream, Aire Head Spring, 
and Malham Cove Spring,^ made by the Rivers Pollution Com- 
missioners in 1869, and (2) of the Smelt Mill Stream, Tarn 
Stream, and Cove Spring made by Rimington in 1878.1 
A complete mineral analysis is now submitted of water 
taken at the Tarn Sluice Gate, the principal Aire Head Spring, 
the Smelt Mill ^\'ater Sink, and Malham Cove. 
The waters were collected on the 5th and 6th August, 1899. 
Owing to the prolonged drought very little water was flowing, 
either from the Aire Head Spring or down the Smelt Mill 
Water Sink. At the latter place, the sample was taken some 
few yards above the spot where the common salt was added on 
June 22nd, 1899, so as to avoid any possible risk of contami- 
nation. "When this sample was taken two brilliant patches of 
fluorescein were noticed, evidently due to some of the strong 
solution having sunk to the bottom of the stream, i 
In the following tables the results are expressed in grains 
per gallon. The atomic weights used are taken from the Sixth 
Annual Report of the Committee on Atomic Weights, 1898 
(oxygen = 16).. § 
* Rivers Pollution Commission, Sixth Report, 1874, pages 43, 112. 
+ Proceedings Yorkshire Geological and Polytechnic Societ}', Vol. VII. , 
page 185. 1878. 
J Six weeks had elapsed since this reagent was used. 
§ Chemical News, Vol. LXXIX., page 207. 1899. 
