The Fading of Water Colours.

Te Aroha News, Volume IV, Issue 180, 27 November 1886, Page 1

The Fading of Water Colours.

Mk William Simpson communicates the result of some interesting experiments on the durability of water - colours to the ' ' Times. " Fifteen years ago Mr Simpson took 31 pigments, including moat of those in general use, and painted them in stripes upon cards. cards were afterwards cut in two, and qno-half exposed to sunlight for thice hours in the morning and to the strong light of the room for the rost of the day. Here are Mr Simpson's list of colours and the result in a tabulated form :—: —

Unchanged. Yoliowonhrc. Bistre. Prussian blue. " Lemon yellow. Lieht red. Cobalt. Newman's permanent yellow. Vermilion, Ultramarine. TCmorald green. India red. Newman's azure. Burnt siei-sia. Madder lake. Lamp-black. Vanayke brown. Puvplb madder. Burnt umber. Cyanine blue.

Faded. Indian yellow (considerably). Brown pinlr. Brown madder (slight). , Gamboge. Sepia (very slight). French blue (very slight.) Cadmium yellow (slightly) Roman scpla (vory slight). Indigo, Disappeared Crimson lake. Carmine.

To titk Public- T, tl\e tma«*RigneA, do this nay make tho following si.'.tement, in hopes that others who have s<ono through a similar affliction may pvotit thereby :— For many months have I bi'on sick : so bad that life was a burden. 1 ho mental depression and physical prostration were something that, cannot bo described. Doctors and patent medicmos I have tried without any relief, but getting worse all the timo. As a forlorn hope I called on Dr. Speer, Palmerston Hmldmgs, Qiiocn-strcot. Hg examined me, and without asking- a question, gavo me every symptom I had. Said he would treat me. From the first tcaspoont'ul of his medicine I felt relief, and have been constantly getting botter over sjnec. Words cannot express my gratitude, i he above statement I make witnont any solicitation, and I am willmg to verify the same before a J.P.— Respectfully yours. R. 4r*MfrMf Charlotte-street, Eden Terrace. """","'