D. VAN rfÖSTRAND. 
21 
Sabine’s History of the Telegraph. 
12mo. Cloth. $1.35. 
HISTORY AND PROGRESS OP THE ELECTRIC TELE 
GRAPH, with Descriptions of some of the Apparatur By 
Robert Sabine, C. E. Second edition, with additions. 
CONTENTS—X. Early Observations of Electrical Phenomena. II. Tele 
graphs by Frietional Electricity. III. Telegraphs by Voltaio Electrioity. 
IV Telegraphs by Electro-Magnetism and Magneto-Electricity. V. 1 e e- 
gräphs now in use. VI. Overhead Lines. VII. Submarine Telegraph Lines. 
VIIL Underground Telegraphs. IX. Atmospheric Electricity. 
Haskins’ Galvanometer. 
Pocket form. Illustrated. Morocco tucks. $2.00. 
THE GALVANOMETER, AND ITS ÜSES; a Manual for 
Electricians and Students. By C. H. Haskins. 
“ We hope this excellent little work will meet with the sale its merits 
entitle it to. To every telegrapher who owns, or uses a Galvanometer, or 
ever expects to, it will be quite indispensable.”— The Telegrapher. 
Cnlley’s Hand-Book of Telegraphy. 
8vo. Cloth. $6.00. 
A HAND-BOOK OP PRACTICAL TELEGRAPHY. By 
R. S. CüLLEY, Engineer to the Electric and International 
Telegraph Company. Pifth edition, revised and enlarged. 
Foster’s Submarine Blasting. 
4to. Cloth. $3.50. 
SUBMARINE BLASTING in Boston Harbor, Massachusetts— 
Removal of Tower and Corwin Rocks. By John G. Fostek, 
Lieutenant-Colonel of Engineers, and Brevet Major-General, U. 
S. Army. Illustrated with seven plates. 
List ov Plates.—1. Sketch of the Narrow«, Boston Harbor. 2. 
Townsends Submarine Drilling Machine, and Working Vessel attending. 
3 Submarine Drilling Machine employed. 4. Details of Drilling Machme 
employed. 5. Cartridges and Tamping used. 6. Enses and Insulated Wires 
used. 7. Portable Fricüon Battery used.