Not all the towers along a transmission line are identical. Look closely at a tower where the line makes a sharp turn and you will likely find it is wider and beefier than other towers along the route. The added strength and weight are needed to resist the unbalanced pull of the conductors, which might overturn an ordinary tower. These special towers are called deviation or angle towers.
The transmission-line tower everybody knows is an Erector Set latticework of steel girders and diagonal braces. The techniques for designing and building these towers are the same ones used in constructing steel bridge trusses or crane booms. The individual pieces can be made cheaply from rolled steel and then bolted together on the site. This last point is more important than it might seem: transporting a fully assembled tower 100 feet tall is an awkward and expensive business.
When poet William Blake wrote of "dark satanic mills", he couldn't have been looking at a steel mill because there were none in 1804. Nevertheless, when I visit a steel mill, Blake's phrase always comes to mind. With the heat and the pounding noise, the dust and smoke, and the red glow against the night sky, it's hard not to see these places as infernal. And yet the process of making steel also produces some of the most hauntingly beautiful images found anywhere in the world of industry.
The series of photos of the 1959 model ends or stops with the photograph in which Kiesler triumphantly shows us the shell of his house like the remains of a creature taken from the seabed, a kind of Moby Dick harpooned and finally captured after the obsessive pursuit of a project that has taken up ten years of the life of the architect.
"I think that everybody has only one basic creative idea and no matter how he is driven off, you will find that he always comes back to it until he has a chance to prove it in purity, or die with the idea unrealized." — Frederick Kiesler
They do not walk, they drip down the surface of the pictures, they are raindrops leaving an erratic trail, drifting down the paper, as described by Asger Jorn and Guy Debord in their psychogeographies.