Shear legs to the gin pole, derrick and tripod (lifting device). Shears are an A-frame of any kind of material such as timbers or metal, the feet resting on or in the ground or on a solid surface which will not let them move and the top held in place with guy-wires or guy ropes simply called "guys". Shear legs only need two guys whereas a gin pole needs at least three. The U. S. Army Field Manual FM 5-125 gives detailed instruction on how to rig shears. Fixed shear legs are most commonly found on floating cranes known as floating sheerlegs.
How the Snake Lost Its Legs enough rhetoric[al] punch. It is accessible to most readers with a light background in biology," though not as suitable for, "the [university] classroom as Held's "Quirks of Human Anatomy"." How the Snake Lost Its Legs How the Snake Lost Its Legs: Curious Tales from the Frontier of Evo-Devo is a 2014 book on evolutionary developmental biology by Lewis I. Held, Jr. The title pays homage to Rudyard Kipling's "Just So Stories", but the "tales" are strictly scientific, explaining how a wide range of animal features evolved, in molecular detail. The book has been admired by other biologists as both accurate