PRACTICAL LESSONS IN ELECTRICITY ELEMENTS OF ELECTRICITY THE ELECTRIC CURRENT FORMERLY ASSISTANT EXAMINER U. S. PATENT OFFIC ELECTRIC WIRING By H. C. CUSHING, JR. AUTHOR OF "STANDARD WIRING FOR ELECTRIC LIGHT AND POWER" STORAGE BATTERIES By F. B. CROCKER, E. M., PH. D., Columbia UniversitY Selected from the Textbooks in the Electrical THIS VOLUME CONSISTS OF FOUR OF THE FORTYFIVE REGULAR TEXT-BOOKS IN THE ELECTRICAL ENGINEERING COURSE OF THE AMERICAN SCHOOL OF CORRESPONDENCE AT ARMOUR INSTITUTE OF TECHNOLOGY, BOUND TOGETHER IN CONVENIENT FORM, BUT NOT IN THE ORDER USUALLY STUDIED. THE PURPOSE OF THE VOLUME IS TO GIVE THE PUBLIC AN OPPORTUNITY ΤΟ JUDGE OF BOTH THE STANDARD AND THE SCOPE OF THE INSTRUCTION OFFERED, THE ELEMENTARY INSTRUCTION BEING ILLUSTRATED BY THE FIRST HALF, AND THE ADVANCED INSTRUCTION BY THE LAST HALF, OF THE BOOK. ALTHOUGH PUBLISHED PRIMARILY ΤΟ DEMONSTRATE THE CHARACTER OF THE TEXT-BOOKS OF THE SCHOOL AND REPRESENTING ONLY A FRAGMENTARY PART OF THE COMPLETE ELECTRICAL ENGINEERING COURSE, YET IT IS CONFIDENTLY BELIEVED THAT THIS VOLUME HAS IN ITSELF ENOUGH PRACTICAL INFORMATION TO MAKE IT A VALUABLE ADDITION TO THE LIBRARY OF THE EXPERT ELECTRICIAN AS WELL AS TO THAT OF THE AMATEUR. |