Download or read book Permissible Electric Lamps for Miners Classic Reprint written by H. H. Clark and published by Forgotten Books. This book was released on 2018-02-15 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Permissible Electric Lamps for Miners Portable electric mine lamps have been used in the United States for at least 5 years and in Europe for nearly 15 years, so that such lamps can not be considered as untried novelties. The last 12 months have been marked by more than usual activity in the development and use of such lamps; several new patterns have been put on the market; other patterns are being developed; old models have been improved; and much interest in the performance of the lamps has been shown by mine operators. Reports from mines where the lamps are being tried indicate that the men prefer portable electric lamps to safety lamps, and in at least one State the use of portable electric lamps in coal mines has been authorized by law. Therefore it seems reasonable to believe that the movement toward a general adoption of portable electric lamps, especially in gaseous mines, has begun and that the number in use will gradually increase. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book Permissible Electric Lamps for Miners written by Harold Hayward Clark and published by . This book was released on 1914 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Approved Electric Lamps for Miners Classic Reprint written by H. H. Clark and published by Forgotten Books. This book was released on 2018-03 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Approved Electric Lamps for Miners When small electric bulbs, with their clear, white light, and small electric storage batteries became available, the advantage of com bining these elements for a miner's lamp seemed manifest. The com bination looked simple and safe, but was soon found to have ele ments of danger and weakness peculiar to itself. The Bureau of Mines showed, in 1911, that the breaking of a miniature electric bulb in an inflammable mixture of gas and air might ignite the mixture, so that only the fragile glass of the lamp bulb might stand between the miner and injury or death. There was also a possibility that sparks from the small battery would ignite gas, and the accidental spilling of the contents of a battery on the miner's clothing or skin was a possible source of injury. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book Permissible Electric Lamps for Miners written by Harold Hayward Clark and published by . This book was released on 1914 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Permissible Electric Mine Lamps written by and published by . This book was released on 1936 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigations of Permissible Electric Mine Lamps 1930 40 written by L. C. Ilsley and published by . This book was released on 1942 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Permissible Electric Mine Lamps supplement to Bulletin 332 written by United States. Bureau of Mines and published by . This book was released on 1936 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Procedure for Establishing a List of Permissible Electric Hand Lamps Trip Lamps Animal Lamps and Rescue Lamps for Use in Gaseous Mines written by United States Mines Bureau and published by . This book was released on 1922 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book POTABLE ELECTRIC MINE LAMPS CLASSIC REPRINT written by H. H. CLARK and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electric Cap Lamps in Alabama Mines 1935 written by Frank E. Cash and published by . This book was released on 1935 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Permissible Electric Cap Lamps written by United States. Bureau of Mines and published by . This book was released on 1940 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Approved Electric Lamps for Miners by H H Clark and L C Ilsley written by L. C. Ilsley and published by . This book was released on 1917 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Permissible Electric Mine Lamps written by Lee Clyde Ilsley and published by . This book was released on 1936 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Procedure for Establishing a List of Permissible Electric Hand Lamps Trip Lamps Animal Lamps and Rescue Lamps for Use in Gaseous Mines written by United States. Mines Bureau and published by . This book was released on 1922 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Standard Lighting written by H. C. Cushing and published by Forgotten Books. This book was released on 2018-03-06 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Standard Lighting: With Incandescent Electric Lamps Since an Object is seen by the light which comes to it from the source and thence by reflection to the eye, it follows that color in the Object is seen only when the light contains rays Of that color. For example, a red Object will appear black under light in which red rays are lacking or a blue Object will appear black when blue rays are absent in the source. Daylight is composed of all the colors in proportions seen in the rainbow The light from Mazda lamps contains all the colors composing daylight but if the spectra, or rainbows, Of the two were to be compared it would be seen that the Mazda lamp was richer than daylight in the orange - red region and weaker in the blue. For ordinary purposes, the light from clear Mazda lamps is sufficiently like daylight to answer all requirements, but where color discr1m1nat10n is a factor, as in sorting or grading pro cesses for example, and in the laundry where scorch marks must be readily distinguishable, or where the artificial light is used to supplement daylight, as in an Office, daylight lamps, which screen out the majority Of the excess orange-red rays, find wide application. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book Field Performance of Permissible Electric Cap Lamps written by United States. Bureau of Mines and published by . This book was released on 1941 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Permissible Electric Mine Lamps written by Lee Clyde Ilsley and published by . This book was released on 1930 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt:
