10/11/1917
https://www.presidency.ucsb.edu...
"These developments have made the tubes practically obsolete, quite unnecessary, and, in fact, a hindrance to the efficient operation of the postal service."
"I am convinced there is no moral or legal obligation resting on the, Government to continue the use of these tubes by rental."
"The advantage of the use is largely theoretical."
"This is an unfounded assumption, because practically all this mail could be handled at less cost and more expeditiously by other means."