The Notebooks of Leonardo da Vinci (1883), XIX Philosophical Maxims. Morals. Polemics and Speculations.
Source: Technical Manifesto of Futurist Music (1911), p. 82
Source: QED: The Strange Theory of Light and Matter (1985), p. 15
“He made an instrument to know
If the moon shine at full or no.”
Canto III, line 261
Source: Hudibras, Part II (1664)
“The law of similarity made any map a magical instrument.”
The Wizardry Compiled (1989)
501.13 http://www.rwgrayprojects.com/synergetics/s05/p0000.html#501.10
1970s, Synergetics: Explorations in the Geometry of Thinking (1975), "Synergy" onwards
Chpt.2, p. 9
Principles of Geology (1832), Vol. 1
Context: It is probable that the doctrine of successive destructions and renovations of the world merely received corroboration from such proofs; and that it was originally handed down, like the religious dogmas of most nations, from a ruder state of society. The true source of the system must be sought for in the exaggerated traditions of those partial, but often dreadful catastrophes, which are sometimes occasioned by various combinations of natural causes. Floods and volcanic eruptions, the agency of water and fire, are the chief instruments of devastation on our globe.... it scarcely requires the passion for the marvelous, so characteristic of rude and half-civilized nations, still less the exuberant imagination of eastern writers, to augment them into general cataclysms and conflagrations.
Introduction
Popular Astronomy: A Series of Lectures Delivered at Ipswich (1868)
“Rhythmical music is that which is made by instruments which render the sound by touch.”
Dictionary of Musical Terms (1475)
Page 386
The Composer in the Machine Age (1933)
III, 13
Meditations (c. 121–180 AD), Book III
