02/02/1916
https://www.presidency.ucsb.edu...
"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."
"During such breakdowns they cease operation for hours and for even days together."
"These developments have made the tubes practically obsolete, quite unnecessary, and, in fact, a hindrance to the efficient operation of the postal service."