582 
these gentlemen have forwarded to 
a large number of the museums of 
the most important towns of France 
and of Europe specimens from the 
excavation of Eyzies. 
Whilst he was proprietor of most 
of the caves which have been ex- 
plored, Mr. Christy has made the 
special reservation, that only the 
unique specimens should remain in 
Notes and Correspondence. 
[July, 
the country in which they had been 
found. Is not this disinterestedness 
above all praise, and does it not 
prove how thoroughly that antago- 
nism, which petulant minds too 
often try to foster, between the two 
first nations of the world, becomes 
obliterated between men who love 
science thoroughly and sincerely ? 
Paris. Tu. Lacaze DUTHIERS. 
Improved Machinery for Boring Rocks. 
The last number of the ‘Jour- 
nal of Science’ contained a brief 
reference to my patent boring-ma- 
chine, in which it was stated that 
it does not differ materially from 
others. 
In this, your “Chronicler ” is un- 
der a misapprehension, and I trust 
I may be permitted to say that my 
patent machine has many important 
advantages over those of other 
makers. 
In order to make good this state- 
ment, or rather to enable my pro- 
fessional brethren to judge for 
themselves in the matter, and also 
because I think that the subject 
must be one of interest to all classes 
q\\N 
miR 
YT Moai 
SNS 
XA 
f 
By George Low. 
of readers, I forward to you the 
following account, illustrated with 
representations of my boring-ma- 
chine, and request the favour of its 
insertion in the Journal. 
The cylinder and boring tool of 
my machine are arranged on a 
telescopic principle, being only 4 
feet 6 inches in length, from end 
to end, and sufficiently short to 
swing round in any direction in a 
tunnel. They are so arranged that 
they can be set to work in any part 
of the face, perpendicularly, hori- 
zontally, sideways, or at any angle 
and in any direction, as best suited 
to the strata, and to meet the con- 
venience of blasting. 
" 
af 
ah 
H 
In Figures 1 and 2, for instance, 
which represent a machine adapted 
for tunnelling, adits, &c., the cylin- 
der is provided with five different 
movements, and is mounted on a 
jib, which allows the cylinder and 
boring tool to be set at any angle, 
perpendicularly to horizontally ; 
the jib being moved up or down the 
columns on a screw inside, and the 
columns can be moved from side 
to side. The jib is also capable of 
