2 p. A journal article giving some history and financial information, as well as a great deal of construction detail, for the jetty built at the mouth of the Columbia River. The work of the pile-driver and use of railroad cars to carry construction supplies on the miles-long trestle are described. Messrs. M. J. Kinney and Robert Gibson are thanked for the accompanying illustrations and data used in the article. The five photographs show lowering of "mattresses" at the end of the jetty; a train load of rock starting its run out; loading rock onto the dump-cars at the jetty dock; the jet pile-driver used in constructing the trestle; and dumping rocks after the "mattresses" have been lowered.
1 p. A letter from W. H. Ballou to the editor of Scientific American discussing statements made by J. F. McIndoe about the south jetty at the mouth of the Columbia River. The letter discusses discrepancies between McIndoe's various estimates of time and money needed to complete the jetty.
