194 Proceedings of the Royal Society of Edinburgh. [Sess. 
reference lines or bases for mining surveys ” which he had imagined, and 
was engaged in making observations with the magnetometer or magnetic 
reflector he had invented for this purpose up to the very day of his death. 
He described the magnetic reflector and the method of employing it in 
conjunction with a theodolite in a paper read before the Institution of 
Mining Engineers in 1918 {Trans. Inst. M.E., vol. lvi, p. 222), and a method 
of employing two magnetic reflectors when greater precision is required 
in a second paper read before the same institution in 1920 (vol. lx, p. 235). 
His other papers include the following : “ On the Present Condition of 
Mining in some of the Principal Coal-producing Districts of the Continent,” 
Proc. N. of E. Inst, of Mining and Mech. Engineers , vol. xxvii, 1878; and 
one on “ James Watt,” Proc. Roy. Phil. Soc. Glasgow , 1920. 
He was elected a Fellow of the Royal Society of Edinburgh in 1918, 
and died on 22nd September 1921 at Kilchrist, near Campbeltown. 
