Location		Original	Correction
Chapter/Section	Page
Chapter II	18	and similiar material	and similar material
Chapter XIII	167	as a constant level	at a constant level
Chapter XIV	186	the carbons to distintegrate	the carbons to disintegrate
Chapter XV	195	John Pechham	John Peckham
		coated with an allow	coated with an alloy
	196	with various billiant	with various brilliant
	200	key in depressed	key is depressed
Chapter XVI	216	has nearly doubled	have nearly doubled
Chapter XVII	230	this own indifference	their own indifference
Chapter XXIII	314	Nature's lighting varied	Nature's lighting varies
Chapter XXIV	332	so-called cadelabra	so-called candelabra
	337	possibilties	possibilities
READING REFERENCES	358	...Applications an Théatre."	...Applications au Théatre."
INDEX	364	Photo-micography	Photo-micrography
	365	Siemans	Siemens