Third Kind of Lever Small 320×213 Medium 640×427 Large 1024×683 Download Tiff Original 2400×1600 | (275.1 KB) Description "In the third order of lever the power acts between the prop and the resistance, where also P : W :: BF : AF, and the pressure on the fulcrum is P-W, or the power less the weight."——Pettigrew, 1874 Keywords class, fulcrum, kind, lever, order, power, pressure, resistance, third Galleries Levers Source: Rawson, W. W. Success in Market Gardening: A New Growers' Manual (Boston, MA: W.W. Rawson, 1892)
