CHAPTER II.
THE PNEUMATIC TRANSIT COMPANY AND THE FIRST PNEUMATIC TUBES FOR THE TRANSPORTATION OF UNITED STATES MAIL.
ORGANIZATION 28
AIM AND OBJECT OF THE COMPANY 28
THE CLAY-LIEB PATENTS 30
FRANCHISES AND FIRST GOVERNMENT CONTRACT 33
SEARCH FOR TUBES 34
METHOD OF MANUFACTURING TUBES 35
LAYING AND OPENING THE TUBES FOR TRAFFIC 37
DESCRIPTION OF THE TUBES, METHOD OF LAYING, ETC. 38
THE AIR-COMPRESSOR—METHOD OF CIRCULATING THE AIR 40
TERMINAL APPARATUS 42
THE SENDER 43
SUB-POST-OFFICE RECEIVER 44
MAIN POST-OFFICE RECEIVER 47
THE CARRIER 50
OPERATION OF THE TUBES 52
BENEFITS OF THE SYSTEM 54