Close to one of these springs we noticed a large open tub in which the family washing was being done in the natural hot water thus supplied; but the water was yellow, and gave off a sulphureous odour-although it did not seem to discolour the clothes.
"A Girl's Ride in Iceland"
Ethel Brilliana Alec-Tweedie
And yet further to show you, that White Bodies Reflect the Beams From them, and not Towards themselves, Let me add, that Ordinary Burning-glasses, such as are wont to be employ'd to light Tobacco, will not in a great while Burn, or so much as discolour a Sheet of White Paper.
"Experiments and Considerations Touching Colours (1664)"
Robert Boyle
Should this appear on the face of the record, I can only say that I have avoided entering into politics, in order that no bias of that sort might lead me to discolour or distort the truths I have had occasion to state; and I have totally rejected those communications which, from their tone of bitterness, personality, and virulence, might be incompatible with the general tenour of an impartial production.
"Paris As It Was and As It Is"
Francis W. Blagdon