The British Encyclopedia: Or, Dictionary of Arts and Sciences. Comprising an Accurate and Popular View of the Present Improved State of Human Knowledge, Τόμος 5Longman, Hurst, Rees, and Orme, 1809 |
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Σελίδα
... axis of the earth does . From what has been said , it is evident that the Moon can never be observed pre- cisely in the ecliptic , but twice in every period ; that is , when she enters the nodes . When she is at her greatest distance ...
... axis of the earth does . From what has been said , it is evident that the Moon can never be observed pre- cisely in the ecliptic , but twice in every period ; that is , when she enters the nodes . When she is at her greatest distance ...
Σελίδα
... axis of the earth , whereby , in each annual revolution it is twice inclined to the ecliptic , and as often returns to its former position . Sir Isaac Newton observes , that the moon has the like motion , only very small , and scarcely ...
... axis of the earth , whereby , in each annual revolution it is twice inclined to the ecliptic , and as often returns to its former position . Sir Isaac Newton observes , that the moon has the like motion , only very small , and scarcely ...
Σελίδα
... axis . To prove whether object - glasses be well cen- tered , hold the glass at a due distance from the eye , and ... axis shorter than its middle diameter , being formed by the rotation of an ellipse about the shorter axis . The ...
... axis . To prove whether object - glasses be well cen- tered , hold the glass at a due distance from the eye , and ... axis shorter than its middle diameter , being formed by the rotation of an ellipse about the shorter axis . The ...
Σελίδα
... axis , H FI , and be moveable about a joint fixed to it at F , so that the plane of the sector may be always parallel to the axis , HI , which being parallel to the axis of the OBSERVATORY .
... axis , H FI , and be moveable about a joint fixed to it at F , so that the plane of the sector may be always parallel to the axis , HI , which being parallel to the axis of the OBSERVATORY .
Σελίδα
... axis of the earth , the plane of the sector will always be parallel to the plane of some hour cir- cle . Let a telescope , CE , be moveable about the centre , C ... axis ; which axis must be so supported , that what is called OBSERVATORY .
... axis of the earth , the plane of the sector will always be parallel to the plane of some hour cir- cle . Let a telescope , CE , be moveable about the centre , C ... axis ; which axis must be so supported , that what is called OBSERVATORY .
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