8vo, *2 00

Induction Coils. (Science Series No. 53.) 16mo, 0 50

Ingham, A. E. Gearing. A practical treatise. 8vo, *2 50

Ingle, H. Manual of Agricultural Chemistry. 8vo, *3 00

Inness, C. H. Problems in Machine Design. 12mo, *2 00

---- Air Compressors and Blowing Engines. 12mo, *2 00

---- Centrifugal Pumps. 12mo, *2 00

---- The Fan. 12mo, *2 00

Jacob, A., and Gould, E. S. On the Designing and
Construction of Storage Reservoirs. (Science Series
No. 6) 16mo, 0 50

Jannettaz, E. Guide to the Determination of
Rocks. Trans. by G. W. Plympton. 12mo, 1 50

Jehl, F. Manufacture of Carbons. 8vo, *4 00

Jennings, A. S. Commercial Paints and Paintings.
(Westminster Series.) 8vo, *2 00

Jennison, F. H. The Manufacture of Lake Pigments. 8vo, *3 00

Jepson, G. Cams and the Principles of their Construction. 8vo, *1 50

---- Mechanical Drawing. 8vo. (_In Preparation._)

Jervis-Smith, F. J. Dynamometers. 8vo, *3 50

Jockin, W. Arithmetic of the Gold and Silversmith. 12mo, *1 00

Johnson, J. H. Arc Lamps and Accessory Apparatus.
(Installation Manuals Series.) 12mo, *0 75

Johnson, T. M. Ship Wiring and Fitting. (Installation
Manuals Series.) 12mo, *0 75

Johnson, W. McA. The Metallurgy of Nickel. (_In Preparation._)

Johnston, J. F. W., and Cameron, C. Elements of
Agricultural Chemistry and Geology. 12mo, 2 60

Joly, J. Radioactivity and Geology. 12mo, *3 00

Jones, H. C. Electrical Nature of Matter
and Radioactivity. 12mo, *2 00

---- Nature of Solution. 8vo, *3 50

---- New Era in Chemistry. 12mo, *2 00

Jones, J. H. Tinplate Industry. 8vo, *3 00

Jones, M. W. Testing Raw Materials Used in Paint. 12mo, *2 00

Jordan, L. C. Practical Railway Spiral. 12mo, leather, *1 50

Joynson, F.