An Elementary Treatise on Electrical Measurement; For the use of telegraph inspectors and operators
London: E. and F. N. Spon, 1868. First Edition. Octavo : pp. 1 unnumbered frontispiece, viii, 175 : tables and diagrams (in text and one folding) : new eps : recently re-backed with original spine laid on : original bevelled boards with gilt blocked illustration (of Clark's Galvanometer?) to the..... More