

FKOK. WWII L CALENDAR AND MB. HERBERT MOSS 

 TABLE IComparison of Results with Formula (8). 



The olervations are arranged in order of temperature. The first column gives the 

 series and number corresponding to the previous tables of observations. The second 

 gives the temperature t of the hot column, except in the case of the first line, 

 Observation III. (4), where the lower limit was -10'450 C. in place of C., and 

 Ixith limits are given. The third and fourth columns give the observed and calculated 

 values of the expansion (V, V )/V between C. and t a , except in the first line, 

 wlwre the expansion (V a V|)/V between t\ and t 3 is given instead. The fifth column 

 gives the differences between the calculated and observed values of the expansion 

 multiplied by 10 T . The last three columns give the observed and calculated values of 

 tin- mean coefficient from C. to t- 3 , and the difference (C 0)xlO", except in the 

 line, where the mean coefficients are from t\ to t 2 . 



y. Order of Accuracy of the Results. 



In comparing the results with the formula, it must be observed that the differences- 

 in Tahlr I. are all calculated to one figure beyond the limit of accuracy of observation, 

 namely. D'OOl cm., which corresponds to 10 in the difference between the calculated 

 and ..Uened values of the expansion. Taking the observations at and below 100 C., 

 tin- mean deviation of the observed expansion from the formula is only 11, which 

 ron.-s|*,.i(ls with the limit of accuracy of reading. The corresponding differences in 

 the \al.i.-s of the mean coefficients, given in the last column, are here without 



'''' ' '"'"*' it was obviously impossible to measure a short column of only 



' ' ''". to an onler of accuracy of 1 in 20,000 under the conditions of the experiment. 



