File:Mural or monumental decoration- its aims and methods. Comprising fresco, encaustic, water-glass, mosaic, oil painting. With an appendix (1869) (14762936671).jpg

Identifier: muralormonumenta00thomrich (find matches)
Title: Mural or monumental decoration: its aims and methods. Comprising fresco, encaustic, water-glass, mosaic, oil painting. With an appendix
Year: 1869 (1860s)
Authors: Thomas, William Cave, b. 1820
Subjects: Mural painting and decoration Mosaics
Publisher: London : Winsor and Newton
Contributing Library: University of California Libraries
Digitizing Sponsor: MSN

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our,or in any degree injuring what I had finished. In one spot Iwished to restore the ground after I had coloured it, andit was with some difficulty, and only by frequent and for-cible use of a stiff brush and a sponge, that I could remove thecolour. When quite dry next day, a solution of water-glasswas formed of 2 parts water and 1 of the concentratedliquor imported from Berlin, and, this solution having beentwice applied, the painting is now perfectly fixed. I havealso to remark that in this case the water-glass for fixing thepicture had been freely passed over it, with a large flat water-colour brush ; and I may further add that I have tried to usein its full force crimson lake (said to be particularly perish-able), and as yet it remains without any apparent deteriora-tion. This specimen having been thinly painted, water freely 202 APPENDIX. used, and the ground rendered very absorbent, I note thesethree conditions to be principal among the causes of the suc-cess of the experiment.
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Fig. 1. Water-glass Sprinkler. Section. Fig. 1. A, A, A, interior of cylindrical barrel accessible toair through the air-holes a, a. B, C, D, piston, valve and roddriven forward, by which the valve C closes the air-holes inB, so that B compresses the air in front of itself, while theexternal air is entering the barrel behind B through the holesa, a, else the piston B could not be driven forward. E, glassbottle containing the fluid which is under pressure of thecompressed air in front of B, through the neck of the bottleI. F, vertical tube in which the fluid ascends with a forceequal to that of the downward pressure of the air on thesurface of the fluid through I. G, head of water-tube per-forated and fitting into the nozzle H of the cylinder, which isalso correspondingly perforated (and is acted upon by twoscrews K, which increase or diminish the flow) so that thefluid becomes jetted forth in a continuous stream as long asthe pressure is exercised. On the piston being retracted fromB

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