A 



J O U R N A ]L 



O F 



NATURAL PHILOSOPHY, CHEMISTRY 



AND 



THE ARTS. 



fANVARY, 1807. 



ARTICLE I. 



Description of a very simple and useful Scale, for dividing the 

 Vanishing Lines in Perspective, In a Letter froin G. Cum- 

 serland, Esq. 



To Mr. NICHOLSON. 

 SIR, 



VARIETY of occupations and speculations have of late introductioa. 

 forced me to neglect some former engagements, to use my poor 

 endeavours in promoting the laudable ends of your truly inte- 

 resting publication. 



But that I may not be thought to have entirely forgot them, 

 I send you the following trifle, which, however simple the idea> 

 will, I am sure, be the more valued by you on that very ac- 

 account, it I have justly estimated the noble simplicity of your 

 intelligent mind. 



Having been in the habit of drawing for my amusem.ent all The valuable 

 my life, and feeling the value of that acquirement, it has been ^'^ of Perspec- 

 my practice to recommend to others as much of that acquisi- 

 tion as can with very little trouble be attained ; I mean the 

 putting into perspective common objects; such as simple 

 landscapes, machines, buildings, and the interior of apartments, 

 manufactories, &c. And where I have bad an opportunity to 



Vol., X VI.~J 4.N. 1807,—No. 65,' B 



