| Perry Fairfax Nursey - 1843 - 678 pages
...lowest part. When the chimney is put together, the upper end of the bottom piece is inserted about £ an inch into the cone of the next piece above, and...is adjusted so that the lamp-chimney enters about -.} an inch into the lower cone, VENTILATION OF LIGHTHOUSE LAMPS. 237 and the top of the ventilating... | |
| William Newton - 1844 - 540 pages
...lowest part. When the chimney is put together, the upper end of the bottom piece is inserted about j- an inch into the cone of the next piece above, and...is adjusted, so that the lamp-chimney enters about -J- an inch into the lower cone, and the top of the ventilating chimney enters into the cowl or head... | |
| Institution of Civil Engineers (Great Britain) - 1844 - 486 pages
...lowest part. When the chimney is put together, the upper end of the bottom piece is inserted about \ an inch into the cone of the next piece above, and...is adjusted, so that the lamp-chimney enters about J an inch into the lower cone, and the top of the ventilating chimney enters into the cowl or head... | |
| William Newton, Charles Frederick Partington - 1844 - 536 pages
...lowest part. When the chimney is put together, the upper end of the bottom piece is inserted about | an inch into the cone of the next piece above, and...is adjusted, so that the lamp-chimney enters about £ an inch into the lower cone, and the top of the ventilating chimney enters into the cowl or head... | |
| 1843 - 508 pages
...lowest part. When the chimney is put together, the upper end of the bottom piece is inserted about .' an inch into the cone of the next piece above, and...is adjusted so that the lamp-chimney enters about 4 an inch into the lower 236 VENTILATION OF LIGHTHOUSE LAMPS. and the top of the ventilating chimney... | |
| Edward Cresy - 1847 - 912 pages
...these pipes are put together to form the chimney, the upper end of the bottom piece is inserted about ! inch into the cone of the next piece above, and fixed there by three ties or pins, leaving at the same time plenty of air-way. After the ventilating chimney is thus completed, it is... | |
| Michael Faraday - 1859 - 522 pages
...lowest part. When the chimney is put together, the upper end of the bottom piece is inserted about £ an inch into the cone of the next piece above, and...firmly held together ; but there is still plenty of air- way, from the surrounding atmosphere into the chimney between them. The same arrangement holds... | |
| William Henry Davenport Adams - 1870 - 336 pages
...each for about an inch and a half being opened out into a conical form, about five inches and a half in diameter at the lowest part. When the chimney is...the ventilating chimney is fixed in its place, it is so adjusted that the lamp chimney enters about half an inch into the lower cone, and the top of the... | |
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