 | 1854 - 492 Seiten
...ihe point to which the ring in the glass lube is pushed, and having murked (his point off, the bull is to be unscrewed, and with a small ramrod the ring is lo be pushed down lill it resls on ihe lop of ihe piston-rod. The bull being replaced, the apparatus... | |
 | 1855 - 424 Seiten
...protection from blows. To graduate this apparatus, I let it down in a known depth of water, say ten fathoms, and having observed the point to which the...ramrod the ring is to be pushed down till it rests on the top of the piston rod. The ball being replaced, the apparatus is sunk in twenty fathoms ; after... | |
 | 1853 - 564 Seiten
...protection from blows. To graduate this apparatus, I let it down in a known depth of water, say 1 0 fathoms, and having observed the point to which the...the apparatus is sunk in 20 fathoms. After a similar mauner it is sunk in 30, and then in 40 fathoms. This will test the accuracy of the apparatus ; and... | |
 | Charles W. Vincent, James Mason - 1854 - 324 Seiten
...protection from blows. To graduate this apparatus, I let it down in a known depth of water, say ten fathoms, and having observed the point to which the...ramrod the ring is to be pushed down till it rests on the top of the piston-rod. The ball being replaced, the apparatus is sunk in twenty fathoms ; after... | |
 | Charles W. Vincent, James Mason - 1854 - 352 Seiten
...protection from blows. To graduate this apparatus, I let it down in a known depth of water, say ten fathoms, and having observed the point to which the...pushed, and having marked this point off, the ball is to he unscrewed, and with a small ramrod the ring is to be pushed down till it rests on the top of the... | |
 | 1855 - 424 Seiten
...protection from blows. To graduate this apparatus, I let it down in a known depth of water, say ten fathoms, and having observed the point to which the...ramrod the ring is to be pushed down till it rests on the top of the piston rod. The ball being replaced, the apparatus is sunk in twenty fathoms ; after... | |
 | 1855 - 424 Seiten
...protection from blows. To graduate this apparatus, I let it down in a known depth of water, say ten fathoms, and having observed the point to which the...ramrod the ring is to be pushed down till it rests on the top of the piston rod. The ball being replaced, the apparatus is sunk in twenty fathoms ; after... | |
 | 1855 - 424 Seiten
...protection from blows. To graduate this apparatus, I let it down in a known depth of water, say ten fathoms, and having observed the point to which the...pushed, and having marked this point off, the ball ia to be unscrewed, and with a small ramrod the _ ring is to be pushed down till it rests on the top... | |
 | 1853 - 494 Seiten
...protection from blows. To graduate this apparatus, I let it down in a known depth of water, say ten fathoms, and having observed the point to which the...ramrod the ring is to be pushed down till it rests on the top of the piston-rod. The ball being replaced, the apparatus is sunk in twenty fathoms ; after... | |
 | 1853 - 1068 Seiten
...protection from blows. To graduate this apparatus, I let it down in a known depth of water, say ten fathoms, and having observed the point to which the...ramrod the ring is to be pushed down till it rests on the top of the piston-rod. The ball being replaced, the apparatus is sunk in twenty fathoms ; after... | |
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... compressed. The ball on the top serves as a mere reservoir of air to equalize the action of the apparatus as much as possible. The whole of this apparatus is enclosed in a wire cage for the sake of protection from blows. To graduate this apparatus,... 