181 
Copper Bolls into Ships. 
ihod of driving copper bolts into ships, without splitting 
the heads or bending them ; and that by means of tubes 
contrived by him for the purpose, this could be effected 
without difficulty, and had been satisfactorily executed 
in the presence of several of the principal ship-builders 
of Bristol. 
A certificate accompanied these letters, from Mr. Wil- 
liam James, and Mr. Samuel Hast, ship - builders, and 
also from Mr. George Winter, of Bristol, testifying that 
they had tried the experiment of driving copper bolts 
through the jointed cylinder invented by Mr. Phillips ; 
and that they so far approve of it, that they mean to adopt 
the general use of them, for driving bolts in all direc- 
tions, particularly on the outside of ships, whether iron 
or copper ; as this method not only prevents the bolts 
from bending, but keeps the heads from splitting, and 
enables the bolts to be driven much tighter, than by any 
other means with which they were acquainted. They 
further add, that by the application of Mr. Phillips’s cy- 
linder and punch, a copper bolt which had been crippled 
at the edge of the hole, and which could not be started by 
a mall, went up with ease in a perpendicular direction 
in the flat of a ship’s bottom, not four feet from the 
ground. 
This certificate was witnessed by Mr. William Hoi 
den. 
The same facts are also certified by Mr. Thomas 
Walker, and Mr. James M. Hillhouse, of Bristol, who 
add their opinion, that the adoption of this invention in 
the different dock-yards of the kingdom, will prove very 
advantageous. 
Since Mr. Phillips’s first application to the Society for 
a premium, he has made a considerable improvement in 
the construction of his tubes. The description and en- 
graving hereunto annexed are of the improved kind : mo 
