WHEN first I saw our banner wave Above the nation's council-hall, I heard beneath its marble wall The clanking fetters of the slave! In the foul market-place I stood, And saw the Christian mother sold, And childhood with its locks of gold,... Read more of Abolition Of Slavery In The District Of Columbia, 1862 at Martin Luther King.caInformational Site Network Informational
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Focal Points








The focal point of a circle is its center, and is called the focus. But an ellipse has two focal points, called foci, represented by F, F in Fig. 148, and by B, B in Fig. 149.
A produced line is one which extends out beyond the marking point. Thus in Fig. 148 that part of the line K between F and G represents the produced portion of line K.
Fig. 149. Fig. 149.






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