2 59 
Mr. Pepys’ Account of a new Eudiometer . 
Simple as this instrument may appear, it is calculated to 
extend our knowledge of the different kinds of air, by the 
precision and accuracy which it enables us to obtain, and which 
solely constitutes the value of every experiment. A degree 
of confidence is inspired from knowing that we can depend 
upon our results ; and hence much valuable time, which would 
have been wasted in uncertain, if not useless investigations, 
may be directly applied to the advancement of science. 
