The Secretary of Agriculture may dispose of photographic prints (including bromide enlargements), lantern slides, transparencies, blueprints, and forest maps at cost and 10 per centum additional, and condemned property or materials under his charge in the same manner as provided by law for other bureaus.
7 U.S. Code § 2243 - Sale of photographic prints and maps
(Mar. 4, 1907, ch. 2907, 34 Stat. 1270.)