Note 4 — III. GEOLOGY.
Reading edition
There are plenty of good works on the use of the blow-pipe. The best are by Plattner and Scheerer, of both of which English translations have been published. Of Von Kobell’s tables for the determination of minerals, several translations have appeared. Brush and Penfield 1906 edition is a practical work. A very portable outfit may be obtained from J. T. Letcher, Truro, Cornwall.