 | Institution of Civil Engineers (Great Britain) - 1844 - 484 pages
...perfectly. Lighthouses have either one large central lamp, the outer wick of which is sometimes 3| inches in diameter, or many single Argand burners,...pieces: the lower end of each of these pieces, for about 1J inch, is opened out into a conical form about 5J inches in diameter at the lowest part. When the... | |
 | Perry Fairfax Nursey - 1843 - 678 pages
...perfectly. Lighthouses have either one large central lamp, the outer wick of which is sometimes 3$ inches in diameter, or many single Argand burners,...: the lower end of each of these pieces, for about 14 inch, is opened out into a conical form about 5£ inches in diameter at the lowest part. When the... | |
 | William Newton - 1844 - 540 pages
...perfectly. Lighthouses have either one large central lamp, the outer wick of which is sometimes 3f inches in diameter, or many single Argand burners,...1^ inch, is opened out into a conical form, about 5y inches in diameter at the lowest part. When the chimney is put together, the upper end of the bottom... | |
 | Institution of Civil Engineers (Great Britain) - 1844 - 486 pages
...perfectly. Lighthouses have either one large central lamp, the outer wick of •which is sometimes 3f inches in diameter, or many single Argand burners,...the lower end of each of these pieces, for about 1 J inch, is opened out into a conical form about 5^ inches in diameter at the lowest part. When the... | |
 | 1843 - 508 pages
...perfectly. Lighthouses have either one large central lamp, the outer wick of which is sometimes 3} inches in diameter, or many single Argand burners,...: the lower end of each of these pieces, for about 11 inch, is opened out into a conical form about :>\ inches in diameter at the lowest part. When the... | |
 | Alan Stevenson - 1850 - 404 pages
...several proofs of extremely bad ventilation in lighthouses, Dr Faraday thus describes his apparatus :* " The ventilating pipe or chimney is a copper tube,...length, but divided into three or four pieces ; the lover end of each of these pieces for about l£ inch is opened out into a conical form, about 5£ inches... | |
 | Michael Faraday - 1859 - 522 pages
...the burning ; and, added to these, that it should perform its own ventilating functions perfectly. The ventilating pipe or chimney is a copper tube,...: the lower end of each of these pieces, for about I '. inch, is opened out into a conical form about 5£ inches in diameter at the lowest part. When... | |
 | Edward Nugent - 1870 - 304 pages
...Commissioners of Northern Lighthouses. The following is a description of Professor Faraday's apparatus : — -The ventilating pipe or chimney is a copper tube...but divided into three or four pieces ; the lower part of each of these pieces for about one and a half inch is opened out into a conical form, about... | |
 | Institution of Civil Engineers (Great Britain) - 1844 - 480 pages
...perfectly. Lighthouses have either one large central lamp, the outer wick of which is sometimes 3f inches in diameter, or many single Argand burners,...about 1^ inch, is opened out into a conical form about 5J inches in diameter at the lowest part. When the chimney is put together, the upper end of the bottom... | |
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Lighthouses have either one large central lamp, the outer wick of which is sometimes 3f inches in diameter, or many single Argand burners, each with its own parabolic reflector. The former is a fixed lamp ; the latter are frequently in motion. The former... 