The Electric Light for Light-Houses and Search-Lights

H. M. Paul
1885 Science  
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more » ... out Early Journal Content at http://about.jstor.org/participate--jstor/individuals/early-journal--content. JSTOR is a digital library of academic journals, books, and primary source objects. JSTOR helps people discover, use, and build upon a wide range of content through a powerful research and teaching platform, and preserves this content for future generations. JSTOR is part of ITHAKA, a not--for--profit organization that also includes Ithaka S+R and Portico. For more information about JSTOR, please contact support@jstor.org. 150 SCIE arm of one of the men. The cost thus far is $1,188,000. The completed structure weighs 81,000 tons. In this connection, some of the heights of notable structures may be of interest: Tower of Pisa, 179 feet; Bunker Hill monument, 221 feet; Great mosque, Cairo, 282 feet; Trinity spire, New York, 284 feet; Campanile, Florence, 290 feet; top of capitol, Washington, 307 feet; Milan cathedral, 355 feet; St. Paul's, London, 365 feet; Antwerp cathedral, 402 feet; Lutheran Mariankirche, Lubeck, 430 feet; St. Stephen's, Vienna, 441 feet; St. Rollox chimney, Glasgow, 450 feet; Great pyramid, 450 feet (originally 485 feet) ; St. Peter's, Rome, 455 feet; Strasbourg cathedral, 468 feet; Cologne cathedral, 511 feet; Philadelphia city hall, to be 535 feet; Washington monument, 555 feet. Many memorial stones were contributed by the states, and by different organizations in this country, and by foreign countries. Some forty of these stones were set in the interior faces. One hundred still remain in the storehouse, and will probably be affixed as slabs to the interior walls in convenient places.
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