 | Basil Jackson - 1847 - 410 pages
...must be done carefully and when the tube is nearly level, or the water will be ejected with violence ; and the surface of the water in the bottles, being...direction the tube is turned, by which the vane of the levelling-staff is adjusted." A more recent invention of our clever neighbours, the French, is the... | |
 | John Fry Heather - 1849 - 202 pages
...must be done carefully, and when the tube is nearly level, or the water will be ejected with violence; and the surface of the water in the bottles, being...direction the tube is turned, by which the vane of a levelling staff is adjusted." The instrument, however, with which observations upon the level of... | |
 | John F. Heather - 1849 - 208 pages
...be done carefully, and when the tube is nearly level, or the water will be ejected with violence ; and the surface of the water in the bottles, being...direction the tube is turned, by which the vane of a levelling staff is adjusted." The instrument, however, with which observations upon the level of... | |
 | Edward Charles Frome - 1850 - 292 pages
...convenience of carriage. On setting the stand tolerably level by the eye, these corks are both withdrawn -f-, and the surface of the water in the bottles being...direction the tube is turned, by which the vane of the levelling-staff is adjusted. A slide could easily be attached to the outside of c and d, by which the... | |
 | Thomas Baker - 1850 - 268 pages
...otherwise the waler will be ejected from one of the bottles ; and the surface of the water in the bottle, being necessarily on the same level, gives a horizontal...direction the tube is turned, by which the vane of a levelling staff may be adjusted." LEVELLING STAVES. (6.) The best constructed levelling staff (Gravatt's)... | |
 | Sir Henry Edward Landor Thuillier - 1851 - 826 pages
...must be done carefully and when the tube is nearly level, or the water will be ejected with violence) and the surface of the water in the bottles being...direction the tube is turned, by which the vane of the levelling-staff is adjusted. A slide could easily be attached to the outside of c ' and d, by which... | |
 | John Fry Heather - 1853 - 340 pages
...be done carefully, and when the tube is nearly level, or the water will be ejected with violence ; and the surface of the water in the bottles, being necessarily on the same level, gives a hori zontal line in whatever direction the tube is turned, by which the vane of a levelling staff is... | |
 | Thomas Baker - 1854 - 260 pages
...carefully, and when the tube is nearly level, otherwise the water will be ejected from one of the bottles ; and the surface of the water in the bottles, being...direction the tube is turned, by which the vane of a levelling staff may be adjusted." LEVELLING STAVES. (6.) The best constructed levelling staff (Gravatt's)... | |
 | John Fry Heather - 1859 - 198 pages
...must be done carefully, and when the tube is nearly level, or the water will be ejected with violence; and the surface of the water in the bottles, being necessarily on the same level, gives a hori zontal line in whatever direction the tube is turned, by which the vane of a levelling staff is... | |
 | Edward Charles Frome - 1862 - 336 pages
...the bottles, which are then corked for the convenience of carriage. On setting the stand tolerahly level by the eye, these corks are both withdrawn,*...direction the tube is turned, by which the vane of the levelling-staff is adjusted. A slide could easily be attached to the outside of c and d, by which the... | |
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... till it nearly reaches to the necks of the bottles, which are then corked for the convenience of carriage. On setting the stand tolerably level by the eye, these corks are both withdrawn, which must be done carefully, and when the tube is nearly level,... 
