Mr, Jlawlinsow? s Colour Mill . 
461 
Arts ; hoping, through their means, to see its ultimate 
success. And, further to give the Society the most com- 
plete assurance in my power, I have annexed the opinion 
of a very ingenious and mechanical friend of mine who 
has frequently seen it work. If any other questions should 
occur to the Committee, that may be in my power to ex- 
plain, I shall gladly do so. I am, &c. 
James Rawlinson. 
Derby , February 6, 1806. 
To Charles Taylor, Esquire. 
P. S. When the colour is ground, I recommend the 
following mode of tying it up in bladders, in preference 
to the usual method. Instead of drawing the neck of the 
bladder close, in the act of tying it, insert a slender cy- 
lindrical stick, and bind the bladder close around it. 
This, when dry, will form a tube or pipe, through which, 
when the stick is withdrawn, the colour may be squeez- 
ed as wanted, and the neck again closed by replacing 
the stick. This is not only a neater and much more 
cleanly mode than the usual one of perforating the blad- 
der ; and stopping the hole with a nail, or more common- 
ly leaving it open, to the prejudice of the colour; but the 
bladder, being uninjured, may be used repeatedly for 
fresh quantities of colour. 
N. B. The barrel of a quill may be tied, in place of 
the stick, into the neck of the bladder, with its closed 
end outwards, which will keep the colour secure 
in travelling, and when used, the end of the quill 
being cut off, it may afterwards be closed by a 
stick.* 
* A certificate from Mr. Thomas Swanwick, of Derby, and also from Mr. John 
Middleton, of St. Martin’s Lane, confirming the above statement, accompanied 
these papers. 
