Wireless Transmission of Photographs Part 9

By J. C. HAWKHEAD and H. M. DOWSETT, M.I.E.E. Provides a complete theoretical course for the Postmaster-General's certificate of proficiency.

310 pages. 240 Diagrams and Ill.u.s.trations. Price 7S. net. (POSTAGE 6D.)

MANUAL DE INSTRUCCIoN TeCNICA PARA OPERADORES DE TELEGRAFIA SIN HILOS.

Por J. C. HAWKHEAD y H. M. DOWSETT, M.I.E.E. Precio: Espana, 10 pesetas; Franqueo, 1 peseta extra. America Latina, $2.25, oro, neto; Franqueo, 25 cents extra. (Great Britain, 9S.; POSTAGE 6D.)

THE ELEMENTARY PRINCIPLES OF WIRELESS TELEGRAPHY.

By R. D. BANGAY. In two Parts. Price 3S. each. (POSTAGE 4D.) Or in one Volume, price 7S. net. (POSTAGE 6D.) Used by H.M. Government for instructional purposes.

PRINCIPIOS ELEMENT ALES DE TELEGRAFIA SIN HILOS.

Por R. D. BANGAY. (Partes 1a y 2a en un Volumen.) PRECIO: Espana, 10 pesetas; Franqueo, 1 peseta extra. America Latina, $2.25, oro, neto; Franqueo, 25 cents extra. (Great Britain, 9S.; POSTAGE 6D.)

PRINCIPES eLeMENTAIRES DE TeLeGRAPHIE SANS FIL.

Par R. D. BANGAY. (Great Britain, 9S.; POSTAGE 6D.)

MAGNETISM AND ELECTRICITY FOR HOME STUDY.

By H. E. PENROSE. Crown 8vo. Over 500 pages. Price 5S. net, (POSTAGE 6D.) Contains fifty complete lessons.

THE CALCULATION AND MEASUREMENT OF INDUCTANCE AND CAPACITY.

By W. H. NOTTAGE, B.Sc. Invaluable to all engaged in Telegraph Engineering.

Indispensable to the Wireless Engineer, Student and Experimenter. Price 3S.

6D. net. (POSTAGE 5D.)

A SHORT COURSE IN ELEMENTARY MATHEMATICS AND THEIR APPLICATION TO WIRELESS TELEGRAPHY.

By S. J. WILLIS. To Students in Wireless Telegraphy, as well as those engaged in the practical application of this Science, this book should prove of real value. Price 3S. 6D. net. (POSTAGE 6D.)

THE MARCONI OFFICIAL GRAMOPHONE RECORDS.

For self-tuition in receiving Morse Signals. Price 4S. each, double-sided.

(POSTAGE 9D.) Set of Six Records, 24S. post FREE.

THE MAINTENANCE OF WIRELESS TELEGRAPH APPARATUS.

By P. W. HARRIS. An up-to-date Manual, full of practical hints and explanations. Diagrams of all ship installations, from kw. to 5 kw. Price 2S. 6D. net. (POSTAGE 4D.)

DICTIONARY OF TECHNICAL TERMS USED IN WIRELESS TELEGRAPHY.

By HAROLD WARD. Vest Pocket Edition. 2nd Edition, revised and enlarged.

Contains over 1500 definitions. Price 2S. 6D. net. (POSTAGE 2D.)

ARMATURE MODEL FOR 1 KW. ROTARY CONVERTER.

Shows every Winding of the Converter Armature from start to finish. Price 1S. net. (POSTAGE 3D.)

MORSE MADE EASY.

By A. L. RYE. Linen backed, for rapidly learning the Morse Code. Price 3D.

net, or post free 3D.

MORSE CODE CARD.

Contains full alphabet, with punctuation marks, figures, abbreviations and contractions. Price 2D., post free.

PRACTICAL WIRELESS TELEGRAPHY.

By E. E. BUCHER. 352 pages. 340 Ill.u.s.trations. Price 12S. 6D. (POSTAGE 6D.)

RADIO-TELEPHONY.

By ALFRED N. GOLDSMITH, Ph.D. 256 pages. 226 Ill.u.s.trations. Price 15S. net.

(POSTAGE 6D.)

STANDARD TABLES AND EQUATIONS IN RADIO-TELEGRAPHY.

By BERTRAM HOYLE, M.Sc.Tech., A.M.I.E.E. 159 pages. Price 9S. net. (POSTAGE 6D.)

VACUUM TUBES IN WIRELESS COMMUNICATION.

By E. E. BUCHER. Deals with the Oscillation Valve. 178 pages. 130 Ill.u.s.trations. Price 12S. 6D. net. (POSTAGE 6D.)

USEFUL NOTES ON WIRELESS TELEGRAPHY. (Students' Library.)

By HAROLD E. PENROSE. Price 1S. 4D. net each. (POSTAGE 2D.)

Book I. DIRECT CURRENT.

Book II. ALTERNATING CURRENT.

Book III. HIGH-FREQUENCY CURRENT AND WAVE PRODUCTION.

Book IV. THE 1 KW. SHIP SET.

Book V. THE OSCILLATION VALVE.

THE OSCILLATION VALVE: THE ELEMENTARY PRINCIPLES OF ITS APPLICATION TO WIRELESS TELEGRAPHY.

By R. D. BANGAY. 215 pages. Price 5S. (POSTAGE 3D.)

THE THERMIONIC VALVE AND ITS DEVELOPMENTS IN RADIO-TELEGRAPHY AND TELEPHONY.

By Dr. J. A. FLEMING, M.A., D.Sc., F.R.S., M.Inst.E.E., etc. 279 pages.

Price 15S. (POSTAGE 6D.)

ALTERNATING CURRENT WORK: AN OUTLINE FOR STUDENTS OF WIRELESS TELEGRAPHY.

By A. Sh.o.r.e. 163 pages. Price 3S. 6D. (POSTAGE 4D.)