| http://www.w3.org/ns/prov#value | - Figure 1 through one of the troughs; Figure 5 is another transverse sectional view taken on the line 5-5 of Figure 1, looking in the direction of the arrows; Figure 6 is a fragmentary sectional view showing the construction of one of the corners of the trough and hood; Fig. 7 is a top plan view of a modification including additional means for securing the sections together; Fig. 8 is a side eleva
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