Wright.] 
446 
[Jan. 1, 
to the original. In the process of moulding it was discovered that 
all the exposed parts of the body inevitabl} 7 became smoothed and 
rounded by the touch of the fingers in holding it, so that only the 
hollows and crevices retained the marks of the tool in all their 
sharpness. It was also seen that the gritty material had consid- 
erable tendency to adhere to the graving tool, so that loose sand 
grains and rough ridges were left along the strokes. 
The burning of the image was accomplished in a porcelain dish, 
heated from beneath by a Bunsen burner, so that the flame did not 
come in contact with the material. The gradual steps of its ev- 
olution, through Ethiopian blackness toward Indian red, were ob- 
served, but the process ceased before a suitable redness was pro- 
duced. The object was then supported upon a wire gauze and 
the flame allowed to play through the gauze, directly upon it. 
Some improvement was obtained in this manner. But finally, cer- 
tain parts, which retained too much blackness, were brightened 
up by the oxidizing flame of a mouth blowpipe and the result is 
what may be seen in the object as it now appears. 
This is the only attempt that was made, and I may say that the 
success of the imitation was far beyond my anticipations. The 
general tone and variations of color in the two are exceedingly 
similar. Whether viewed by the unaided eye, or examined with 
a Coddington lens, nearly every surface feature of the one is re- 
produced in the other. There is a larger supply of quartz and 
mica grains in the duplicate than in the original, but this depends, 
of course, upon an arbitrary selection of materials at the begin- 
ning. The interior color of the two is precisely the same and the 
tenacity of the material is also identical. The duplicate has suf- 
fered the accident of having its head broken off, so that an oppor- 
tunity was afforded of comparing the two side by side. The com- 
parison has been made by a large number of persons, professors 
in Oberlin College, and others. 
There is only one point, which seems of any importance, in 
which the duplicate fails to reproduce the original, and that is a 
superior tint of redness at one or two points upon the surface of 
the original, notably upon the back, and at the left hand. This 
raises the question whether the extremer tint in the original may 
not be due to a slow deposit of iron rust from external, or even 
internal sources, and thus furnish evidence of its antiquity. To 
this it may be replied that the extremer color can be obtained by 
