HOSE.
Early Types Made of Canvas-Wound Rubber Tubing 80
Standard Weight Adopted 80
First Type Produced Especially for Use in Vacuum Cleaning Work 81
First Attempt to Produce Light-Weight Hose 81
Other Types 82
Hose Couplings 82
Hose Friction 84
Effect of Hose Friction 88
Most Economical Hose Size for Carpet and Floor Renovators 93
Conditions for Plant of Small Power 97
Limit of Length for Hose 99