IN the Brown Boveri Review for October a very impressive list is given of the mercury arc rectifiers for power transmission which the firm has shipped to overseas countries. We are glad therefore to ...

DURING recent years there has been an increasing demand for machines and devices which will convert alternating currents into direct currents. Bulk supplies are usually given by alternating currents, ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. crate: 40 in x 12 1/2 in x 12 1/2 in; ...