CHEMICAL PRINCIPLES. 
347 
' inch, the difficulty of seeing and applying them in short 
jces is not considerable ; but when their diameter is farther 
duced, and their length as much as an inch or more, the 
ghtest current of air is sufficient to defeat all attempts to lay 
is therefore necessary to retain a part of the silver coating at 
ch extremity, which, at the same time that it assists in finding 
e end, also serves to stretch the wire with a certain moderate 
nsion, and affords the means of attaching it in any required 
>sition. 
The method that I have found most conveaient, is to bend a 
>rtion of the coated wire into the shape of the letter U, with 
nail hooks at its upper extremities. In this form it will con- 
miently hang upon a wire of gold or of platina, with the 
west part immersed in nitrous acid, till the coating of silver 
removed from that part. It may then, without difficulty, be 
fted from its place, by one of the hooks alone, to any other 
illtuation, or suspended by it, with the other hook downwards, 
as the means of attaching a small chain, or other series of 
nqiial weights in trials of its tenacity. 
Mil explanatory Statement of the Notions or Principles upon 
u-kich the systematic ylrrrangement is founded, which was 
adopted as the Basis (f an Essay on Chemical Nomenclature. 
By Professor Berzelius, &:c. &c. 
(Concluded from p. 137-J 
V. Oxides of Gold. 
E come now to such metals as afford no other bases with Oxides of gold. 
! 3 ining with other oxides, seldom contain oxigen in a multiple 
lold of an object so difficult to see, and so impossible to feel. 
I If. 
oxigen, than such as are salifiable, and which by com- 
of 
