Here the track of the disused mining tram is a well-engineered road direct to the foot of the crag, where the fragments of the baryta mine are littered about.
"Climbing in The British Isles. Vol. 1 - England"
W. P. Haskett Smith
Pyroxylin is made by treating cotton with equal parts of nitric and sulphuric acids, then washing with water till the latter ceases to give a precipitate with chloride of baryta; then dry in the air.
"The Medicinal Plants of the Philippines"
T. H. Pardo de Tavera
Nitrate of baryta will show the presence of sulphuric acid, and nitrate of silver of hydrochloric acid.
"Aids to Forensic Medicine and Toxicology"
W. G. Aitchison Robertson