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" ... the object he views. There is no small speculum, but the magnifiers are applied immediately to the first focal image. From the opening of the telescope, near the place of the eye glass, a speaking-pipe runs down to the bottom of the tube, where it... "
Dictionary of the Mathematical and Physical Sciences, According to the ... - Σελίδα 490
επεξεργασία από - 1823 - 576 σελίδες
Πλήρης προβολή - Σχετικά με αυτό το βιβλίο

The Monthly Magazine, Τόμος 1

1796
...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...

Ambulator: Or, a Pocket Companion in a Tour Round London, Within the Circuit ...

1800 - 252 σελίδες
...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,...

The Accomplished Tutor: Or, Complete System of Liberal Education ..., Τόμος 1

Thomas Hodson - 1806
...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,...

The Accomplished Tutor; Or, Complete System of Liberal Education ..., Τόμος 1

Thomas Hodson - 1806 - 458 σελίδες
...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...

The ambulator; or, The stranger's companion in a tour round London ...

John Bew - 1807
...the observer being placed in a seat, suspended at the end of it, with his back toward the object he views. There is no small speculum, but the magnifiers...applied immediately to the first focal image. From tilt opening of the telescope, near tire place of the eye-glass, a speaking-pipe runs doi\n to the...

London: Being an Accurate History and Description of the British ..., Τόμος 5

David Hughson - 1808
...the observer being placed in a seat, suspended at the end of it, with his back toward tlie object he views. There is no small speculum, but the magnifiers...the opening of the telescope, near the place of the eye glass, a speaking pipe runs down to the bottom of the of the bairn or boy-bishop, was to be observed...

London; Being an Accurate History and Description of the British ..., Τόμος 5

David Hughson - 1808
...the observer being placed in a seat, suspended at the end of it, with his hack toward the object he views. There is no small speculum, but the magnifiers are applied immediately to the first focal ima-^e. From tjhe opening of the telescope, near the place of the eye glass, a speaking pipe runs down...

London, by David Hughson, Τόμος 5

Edward Pugh - 1808
...the object he views. There is no small speculum, but the magnifiers arc applied immediately to tiie first focal image. From the opening of the telescope, near the place of the eye glass, a speaking pipe runs down to the bottom of the of the bairn or boy-bishop, was to be observed...

The Emporium of Arts and Sciences, Τόμος 1

1815
...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...

Encyclopaedia Perthensis; Or Universal Dictionary of the Arts ..., Τόμος 22

1816
...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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