 | Art - 1796 - 472 pages
...direct his voice into this pipe, whilft his eye is at the glafs. This pipe is i£ inch m diameter, runs down to the bottom of the tube, where it goes into a turning joint, thence into a drawing tube, and out of this into another turning joint, from which it proceeds by a... | |
 | 1800 - 274 pages
...focal »image. From the opening of the telefcope, near the place of -the eye-glafs, a fpeaking-pipe runs down to the bottom of the tube, where it goes into a turning joint ; and, alter feveral other inflexions, it at length divides into two branches, one going into the obfervatory,... | |
 | Thomas Hodson - Education - 1806 - 576 pages
...of the eye glafs, which the obferver looks through,' at the focal image, is a fpeaking pipe, which runs down to the bottom of the tube, where it goes...Several other inflections, it at length divides into two parts,' -one of •which goes into the obfervatory D, and the other into the work-room E. By this fpeaking-pipe,... | |
 | Thomas Hodson - Arithmetic - 1806 - 502 pages
...place of the eye glafs, which the obferver looks through, at the focal image, is a fpeaking pipe, which runs down to the bottom of the tube, where it goes into a turning joint ; and after feveral other inflections, it at length divides into two parts, one of which goes into the obfervatory... | |
 | John Bew - 1807 - 408 pages
...image. From tilt opening of the telescope, near tire place of the eye-glass, a speaking-pipe runs doi\n to the bottom of the tube, where it goes into a turning joint; and, after several other inflexions, it at length divides into two branches, one going into the observatory, and the other into... | |
 | Edward Pugh - 1808 - 572 pages
...Britannia, Vol. I. p.557. tube, where it goes into a turning joinr; and, after several other inflexions, it at length divides into two branches, one going into the observatory, and the other into the work room; and thus the communications of the observer are conveyed to the assistant... | |
 | David Hughson - London (England) - 1808 - 576 pages
...an antient tenure, was abolished by the late provost, Dr. Cooke. — Magna Britannia, Vol. I. p.557. tube, where it goes into a turning joint ; and, after several other inflexions, it at length divides into two branches, one going into the observatory, and the other into... | |
 | David Hughson - London (England) - 1808 - 566 pages
...Vol. I. p.557. tube, tube, whore it goes into a turning joint; and, after several other inflexions, it at length divides into two branches, one going into the observatory, and the other into the work room ; and thus the communications of the observer are conveyed to the... | |
 | John Redman Coxe, Thomas Cooper - Industrial arts - 1815 - 554 pages
...direct his voice into this pipe, whilst his eye is at the glass. This pipe is 1 1-2 inch in diameter, runs down to the bottom of the tube, where it' goes into a turning joint, thence into a drawing tube, and out of this into another turning joint, from which it proceeds by a... | |
 | Encyclopedias and dictionaries - 1816 - 752 pages
...image. From the opening of the telcicope, near the place of the eye-glafs, a fptviking pipe rur.!| clown to the bottom of the tube, where it goes into a turning join! ; and after ieverr.l other inflections, it at lenpth divides into two branches, one going into... | |
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By means of the speaking-pipe the communications of the observer are conveyed to the assistant in the observatory, and the workman is directed to perform the required motions. 
