Encara no tenim significats per a "d d".
1The central thickest line, d d, is the Mineral Kingdom.
2These cords are lettered A A and D D in his plan.
3If parallel rays of light fall upon a double-convex lens, D D, Fig.
4What the d' d' didos are y' abaout with them great huffs o' yourn?
5C C is marked off similar to A A; and D D to B B.
6At Huanchaca this stirrer has been made with four projecting radial arms, D D, Figs.