Pedagogical Sketchbook A Book by Paul Klee Half-winged, half-imprisonedTO STAND DESPITE ALL POSSIBILITIES TO FALLThe senses of form and toneA mind so in flux
Economy of material and labor Whatever the comparative merits of [various bed framing methods], what is clear from Aristotle's Mechanica is that economy of material, and labor, was as much an issue in ancient times as it is now. Henry Petroski, The Evolution of Useful Things The requirements of economyThe art of not constructing simplicity