220 Fifth Ave., N. Y.
and London, Eng.
[Transcriber's Notes:]
page 238: changed "diagramed" to "diagrammed" (As there diagrammed, the electricity passes out...)
page 253: the Morse telegraph code is as in the original; this is not the modern International Morse code
page 383: the table of hyperlinked first letters has been added for your convenience and is not present in the original
Page 412: changed "conrcete" to "concrete" (... shall express this ideal in a very concrete way.)
General: variable spelling of iodin/iodine in the original has been preserved
General: spelling of dioxid and chlorid in the original has been preserved