262 Dr Hamilton o?^ a 3faj) of Ava^ dfa’icn 
18 inches, the hand being applied to the pencil socket, (for the 
pencil was not pressed upon by the hand), the upper point of 
tlie index was led along the lines of the objects intended to be 
delineated ; and when perpendicular lines occurred, the in- 
dex pointing to the upper end of them, the finger of the left 
hand being applied to the board touching the perpendicular 
slip, and the pencil drawn downwards, the line would be 
straight, and in the same way the horizontal slip served as a 
guide for horizontal lines. All others were drawn by the eye 
guiding the index, and, if the paper was smooth, could be drawn 
very correctly. 
The whole of the double parallelogram and its attached slips, 
(which latter were contrived to be easily separated from the board), 
were made capable of being readily folded up, so as to occupy 
only a small space in the box, formed by the board when fold* 
ed up. The sight-piece also folded up, and readily found its 
place in the box, which also contained screws for fixing, on the 
legs of the instrument, and the box, when shut, could be put 
into a great-coat pocket. The three legs w'ere made of tinned 
iron, tapering, and every one a little smaller than another, so 
that they went into one another, and formed a w^alking stick 
about feet long. 
I made many of these instruments about the time men- 
tioned, perhaps from fifty to eighty ; they went to various parts 
of the world. Among other places several went to London, 
where George Adams senior copied and made them for sale. 
AiiT. 1^.—~A7i Account of a Map (f the Countries subject to 
the King of Ava^ drawn hy a Slave of the Kinfs Eldest Son. 
By Francis Hamilton, M. D. & F. R. S. & F. A. S. Lond. 
& Eclin. Communicated by the Author. (Concluded from 
p. 95.) 
T O explain the names in this Map, I may begin at the north 
and west wdth the Kasi country, which is that called Cussay by 
* Mr Arrowsmith, and Meckley by Major Rennell, its capital be- 
ing Manipur. None of these names, however, are used by the 
