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The description and use of the globes and the orrery. To which is prefix'd, by way of introduction, a brief account of the solar system / by Joseph Harris
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Sect.a. of the GLOBES. 85 ,

the Poles, is because the former of thesetwo serve to shew the Distance of any Pointon the Globe from the Equator, and theother to elevate the Globe to the Latitudeof the Place.

2. The upper Side of the Wooden Frame, Wooden

1 called the Wooden Horizon, represents the***®'true Horizon; the Circles drawn upon thisPlane have been already described; we mayobserve, that the first Point of T is theEast, and the opposite being the first Pointof A is the West, the Meridian pastingthrough the North and South Points.

3. The 'Quadrant of Altitude is a flexible S^adrantPlate of thin Brass, having a Nut and Scrcw°f Jlt t!lde 'at one End, to be fastened to the Meridian

of either Globe, as Occasion requires. TheEdge of this Quadrant, which has the Gra-duations upon it called the fiducial Edge, isthat which is always meant whenever wemake Mention of the Quadrant of Altitude.

4. The Horary or Hour Circle- is divided Hour dr-into twice twelve Hours, the two XHs c/fcoinciding with the Meridian: the upper-most XII is that at Noon, and the lower-most towards the Horizon is XII at Night ,

The Hours on the East Side of the Meri-dian are the Morning Hours, and those onthe West Side the Hours ajter Noon . TheAxis of the Globe carries round the Handor Index which points the Hour, and passesthrough the Center of the Hour Circle.

G 3 The