67 
for the Use of Engravers . 
the liberty to present the foregoing account of it to the 
Patriotic Society, with a figure of it, trusting it will be 
found not less useful to artists than to the art itself.* ■, 
Plate 3. fig. 1 . represents the whole machine, as it is used* 
A. Copper-plate on which the engraving is to be made. 
aaaaaaaa. Screws by which the plate is affixed 
to the movable board B. 
• B. The upper or movable part of the table. It con- 
sists of a thin plank, to the bottom of which is united the 
iron plate represented in Fig. 3. 
C. The under-board, which is made to rise and fall at 
pleasure, in the manner of a desk, by means of a pair of 
hinges ; in the middle of it is a pretty thick axis. 
I). The foot by which the desk is supported at any re- 
quired height. 
E. The frame of the table. 
Fig. 3. The under-board or desk. 
F. A circle of iron, through the middle of which pro- 
trudes that part of the axis marked H. (In Fig. 4.) 
* [I am happy to have it in my power to confirm the value of the 
above paper, by the following testimonial of some of our best en- 
gravers. Ed.] 
Philadelphia , April 27, 1812. 
Sir, 
We have lately seen the plan of a Table invented by the Abbe 
Joseph Longhi, of Monza, for the use of Engravers, and upon exa- 
mination of the same, we are of opinion that the invention is not 
only very ingenious, but also extremely well calculated for the pur- 
pose intended. We are, sir, yours, &c. 
GEO. MURRAY. 
CORNs. TIEBOUT. 
FRANCIS KEARNEY. 
WILLIAM KNEASS. 
D. EDWIN. 
Dr. Coxe. 
