The British Encyclopedia, Or Dictionary of Arts and Sciences: Comprising an Accurate and Popular View of the Present Improved State of Human Knowledge : Illustrated with Upwards of 150 Elegant Engravings. N - R. 5Longman, 1809 - 680 pages |
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Page 12
... 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 ...
Page 15
... 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 ...
Page 17
... 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 ...
Page 19
... axis , HF I , 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 , HF I , 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 .
Page 20
... 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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acid action ammonia angle angle of incidence animal appear axis benevolence body botany called calyx centre chyle circle class and order colour common compound connected consequently consists convex convex lens corolla degree distance distilled drupe Dubl earth ecliptic Edin effect employed equal Essential character feelings feet fixed flowers fluid fossil genus glass heat Hence ideas inches instrument iron ject Jussieu kind length less light Lond manner matter means ment metal mind Monogynia class motion mucilage muriatic muriatic acid Natural order nitre nitric acid object observed organs oxide oxygen parabola parallel pass perpendicular person piece plane plants Plate pleasures potash pound principle produced proportion quantity racter rays receiver refraction seeds sensation sensible side solution sometimes species specific gravity stances substances sulphur supposed surface term tincture tion Triandria tube vegetable vessels volatile oils weight