MR. RAWLINSON's c'OLOUk MILL. iSS 



is evident, from my Iiaving ufed it feveral years before 1 pre- 

 fumed to recommend it to their attention. "Being thereforte 

 now completely convinced of its utility, and hoping that it 

 might relieve a nuinlber of my fellow-crealures froiii a dan- 

 gerous employment, I have ventured to commit it to the pro- 

 tedion of the Society of Arts ; hoping, through I heir mean.% 

 to lee its ultumate fuccels. And, farther to give t'he Society 

 the mofl. complete adu ranee in my power, 1 huve annexed the 

 opinion of a very ingenious and mechanical friend of mine 

 who has frequently feen it work. If any other queilions (hould 

 occur to the Committee, that may be in my power to explain, 

 1 (hall gladly do fo. 



I am. Sir, 



Your mod obedient fervant 



JAMES RAWLINSON. 



Derhy, Feb. 6, ISOk 



Charles Taylor, Efq. 



P. S. When the colour is ground, I recommend the follow- Inftrufblons for 

 ing mod6 of tying it up in bladders, in {^reference to the uftial 2'"fg"^ \ ^ 

 method. Inflead of drawing the neck of the bladder clofe, in lour. 

 i\\e act of tying it, infert a (lender cyliixlrical (iick, and bind 

 tlie bladder clofe around it. This, when dry, will form a 

 tube or pipe, through which, when the ftick is withdrawn, 

 (he colour may be fqueezed as wanted, and the neck again 

 clofed by replacing the ftick. This is not only a neater and 

 much more cleanly mode than the ufual one of perforating the 

 bladder ; and flopping the hole with a nail, or more com- 

 monly leaving it open, to the prejudice of the colour; but 

 liie bladder, being uninjured, may be ufed repeatedly for 

 freib quantities of colour. 



N, B. The barrel of a quill may be tied, in place of the 

 llick, into the neck of the bladder, with its clofed end out- 

 wards, which will keep the colour fecure in travelling, and 

 when ufed, the end of the quill being cut off, it may after- 

 wards be clofed by a flick.* 



* A certificate from Mr. Thomas Swanwick, of Derby, and 

 alfo from Mr. John Middleton, of St. Martin's Lane, confirming 

 the above ftatement, aeconipanied thefe papers. 



Jieference 



