Montreal, Nov 28, 2018, 4:40 pm (in honour of Benjamin Silliman)

Action notes: Yale University professor Benjamin Silliman, wrote the following: “Key-note of nature. The aggregate sound of nature, as heard in the roar of a distant city, or the waving foliage of a large forest, is said to be a single definite note, appreciable pitch. This tone is held to be the middle F of the pianoforte—which therefore be considered the key-note of nature.”

Action constraints: