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| [1]. | Cleaning Tests of Dirty Carpets | 34 |
| [2]. | Cleaning Tests of Carpets Filled with Quicksand | 38 |
| [3]. | Cleaning Tests Using 1 oz. of Sand per Square Yard of Carpet | 40 |
| [4]. | Comparison of Tests Made by Mr. Reeve and by the Author | 48 |
| [5]. | Effort Necessary to Operate Cleaning Tools | 51 |
| [6]. | Vacuum Required at Hose Cock to Operate Type A Renovators Attached to VaryingLengths of Different-Sized Hose | 89 |
| [7]. | Air Quantities and Vacuum at Renovator with 1-in. Hose and 10 in. Vacuum at Hose Cock | 90 |
| [8]. | Air Quantities and Vacuum at Renovator with 1¹⁄₄-in. Hose and 6 in. Vacuum at Hose Cock | 90 |
| [9]. | Vacuum Required at Hose Cock to Operate Type C Renovators with Various Lengths ofThree Sizes of Hose | 91 |
| [10]. | Air Quantities Through Floor Brush with Various Sizes and Lengths of Hose, Operatedon Same System with Type A Renovators | 92 |
| [11]. | Horse Power Required at Hose Cock to Operate Bare Floor Brushes on Same System withType A Renovators | 93 |
| [12]. | Free Air Passing Brush Type of Bare Floor Renovator Operated on Same System with TypeC Carpet Renovators | 94 |
| [13]. | Horse Power at Hose Cock with Brush Type of Bare Floor Renovator Operated on SameSystem with Type C Carpet Renovators | 94 |
| [14]. | Cubic Feet of Free Air Passing the Felt-Covered Floor Renovator Operated on Same Systemwith Type A Renovators | 96 |
| [15]. | Horse Power Required at Hose Cock to Operate Felt-Covered Floor Renovators Operated onSame System with Type A Renovators | 96 |
| [16]. | Vacuum at Hose Cock with 2 in. Vacuum at Type A Renovator | 97 |
| [17]. | Air Quantities when Bristle Bare Floor Renovators are Used in Conjunction with Type ACarpet Renovators at 2 in. Mercury | 98 |
| [18]. | Pipe Sizes Required, as Determined by Air Passing Renovators | 109 |
| [19]. | Friction Loss in Pipe Lines, with Carpet Renovators in Use Exclusively | 109 |
| [20]. | Pressure Losses from Inlet to Separator in System for Cleaning Railroad Cars | 121 |