 | Thomas Dick - Astronomical instruments - 1845 - 644 pages
...strengthening the sides. The diameter of the tube is 7 feet. It is fixed to mason-work, in the ground, to a large universal hinge which allows it to turn in all directions. At 12 feet distance, on each side, a wall is built, 72 feet long, 48 high on the outer side, and 56 on... | |
 | Thomas Dick - 1845 - 608 pages
...strengthening the sides. The diameter of the tube is 7 feet. It is fixed to mason-work, in the ground, to a large universal hinge which allows it to turn in all directions. At 12 feet distance, on each side, a wall is built, 72 feet long, 48 high on the outer side, and 56 on... | |
 | Thomas Dick - Astronomical instruments - 1848 - 408 pages
...purpose of strengthening the sides. The diameter of the tube is seven feet. It is fixed to mason-work in the ground by a large universal hinge, which allows it to turn in all directions. At 12 feet distance on each side a wall is built, 72 feet long, 48 high on the outer side, and 56 on the... | |
 | Ormsby MacKnight Mitchel - Astronomy - 1851 - 374 pages
...strengthening the sides. The diameter of the tube is 7 feet. It is fixed to mason-work in the ground, to a large universal hinge ; which allows it to turn in all directions. At 12 feet distance on each side, a wall is built, 72 feet long, 48 high on the outer side, and 56 on... | |
 | Ormsby MacKnight Mitchel - Astronomy - 1851 - 366 pages
...strengthening the sides. The diameter of the tube is 7 feet. It is fixed to mason-work in the ground, to a large universal hinge ; which allows it to turn in all directions. At 12 feet distance on each side, a wall is built, 72 feet long, 48 high on the outer side, and 56 on... | |
 | John Murray (publishers.) - 1864 - 502 pages
...made of deal 1 inch thick. The focal length of the speculum is 52 ft. The tube is fixed to mason-work in the ground, by a large universal hinge, which allows...to turn in all directions. At each side of it, at 12 ft. distance, a wall is built, which is 72 ft. long, 48 ft. high on the outer side, and 56 on the... | |
 | John Murray (Firm) - Ireland - 1866 - 512 pages
...the speculum is 52 ft. The tube is fixed to mason-work in the ground, by a large universal hirrgo, which allows it to turn in all directions. At each side of it, at 12 ft. distance, a wall is built, which is 72 ft. long, 4S ft. high on the outer side, and 56 on the... | |
 | Thomas Dick - Philosophy and religion - 1869 - 664 pages
...strengthening the sides. The diameter of the tube is seven feet. It is fixed to masonry in the ground, to a large universal hinge, which allows it to turn in all directions. At twelve feet distance on each side, a wall is built, seventy-two feet long, fortyeight high on the outer... | |
| |
The diameter of the tube is 7 feet. It is fixed to mason-work in the ground, to a large universal hinge, which allows it to turn in all directions. At 12 feet distance on each side, a wall is built, 72 feet long, 48 high on the outer side, and 56 on the... 