PHILOSOPHICAL 
TRANSACTIONS. 
I. An Account of the construction and adjustment of the new 
Standards of Weights and Measures of the United Kingdom of 
Great Britain and Ireland . By Captain Henry Kater, 
F. R. S. 1 
Read November 24, 1825. 
The weights and measures of the United Kingdom of 
Great Britain and Ireland are founded upon a standard, the 
length of which is determined by the proportion it bears to 
that of the pendulum vibrating seconds of mean time in 
London. The length of this pendulum I have stated to be 
39,13929 inches of Sir George Shuckburgh Evelyn’s 
standard scale ; and the experiments from which this con- 
clusion is deduced, are detailed in the Philosophical Transac- 
tions for 1818. The important consequences, however, which 
attach to this result, render it necessary to examine with 
what degree of confidence it may be received. 
In the Paper to which I have alluded, it is mentioned that 
a series of experiments had been made previous to those 
detailed ; the result of which was rejected, in consequence 
of its being discovered, after their completion, that the steel 
mdcccxxvi. B 
