1882.] 
Analyses of Books . 
105 
gelatinous mass : this solution is, for certain patterns or for the 
sake of economy, sometimes modified by mixture with the muci- 
lage extracted from various seeds by soaking in hot water. 
Upon the surface of a bath thus prepared, the colours — which 
are ground in water and tempered with a wax medium, partly to 
fix the colours on the paper, and partly to facilitate the glazing 
process used in completing the paper — are thrown or sprinkled, 
according to the effedt to be produced, each succeeding colour 
having a little more ox-gall mixed with it, which causes it to 
spread and drive before it the other pigments in which the pro- 
portion of gall is somewhat smaller, the result being a surface 
covered with variously coloured spots and veins : these, in some 
patterns, receive modifications by combing and curling with a 
few simple tools. 
The examples of paper in various progressive stages assist 
greatly in the understanding of the various modes of working— 
a matter rather difficult to understand without such assistance. 
The specimens given are numerous, and the reader cannot help 
being struck with the great beauty of many of the patterns. 
Mr. Woolnough considers that there is much scope for further 
progress in the art, and that chemistry might be pressed into its 
service with every probability of discovering new means of 
working. 
A detailed account is given of the way of making the whole of 
the patterns described in the book. 
VOL. IV. (third series). 
I 
