37 6 6N THE CAMERA LUCID A. 



inconveniences making use of this instrument, and for which I could not 



desirable. f m( j a renie( ]y . others have, as I am informed, found the 



same inconveniences, and not been able to obviate them ; 



some, may have been more fortunate; and if they have, they 



will render a very acceptable service by pointing out the 



means of removing these defects : but, if they should do 



so, I believe it will still be impossible to produce a view, 



of any magnitude, by means of the camera lucida, with as 



much ease, expedition, and in as masterly a manner as an 



able artist can, if he pleases, draw in the camera obscura. 



Tbis opinion I must entertain, till I see drawings as masterly 



Mr. Daniel's in point of execution as Mr. Daniel's views in India, made 



views. by means of the camera lucida; I mention Mr. Daniel's 



Tiews on this occasion, because I have been credibly in, 



formed, that they were all drawn in the camera obscura, 



and, as they are well known, they form a good public 



standard of comparison. 



Aninstrument It appears then, that a perfect instrument to be used as 



still desirable. a delineator is still a desideratum, and will be obtained, 



when the separate advantages of the camera obscura and the 



camera lucida can be united in the same instrument, and not 



be diminished by any of the inconveniences to which each 



of them is at present subject. 



I am, Sir, 



Your most obliged Servant, 



T SHELDRAKE. 



50, Strand, m 



July 6th, 1809, 



References to the Drawing. 



Fig. 1. Sketch from nature as it may be seen and drawn 

 immediately in the camera obscura. 



Fig. 2. Part of the same view as seen in the camera lucida ; 

 the upper half contains a portion of the horizontal lines in 

 the view as reflected in the glass : the lower half shows the 

 pencil imitating the same lines upon the paper, it is obvious 

 that by looking diagonally into the glass the view may be 

 extended so as to take in a portion of those lines which 

 cannot be seen when looking directly into the glass. 



Fig. 3. Fart of the tree seen in the upper half reflected 



in 



