136 



REPORT — 1855. 



Table IV. (contimied).— Means for the years 1852, 1853, 1854, and 1855. 



The accompanying diagrams I have prepared in order to convey a more 

 accurate and comprehensive perception of tiie results than can be obtained by 

 consulting tables and figures, and also to enable a comparison of the different 

 years to be made with greater facility. 



The Charts contained in Plate VII. are reduced from some very large and 

 carefully prepared tracings laid down by I\Ir. Hartnup, directly from the 

 worked paper of the integrating instrument, according to the method first 

 susj^ested by Di"- Whewell ; on examining these tracings for each year, they 

 will be found to bear but little resemblance to one another ; and il we refer to 

 tiiose projected in a similar manner for Plymouth, by Sir William Harris, 

 during the years 184-1, 1842, and ISiS*, as great a difference will be found 

 to exist, one feature only being at all observable throughout, and that is the 

 general tendency of the wind from the W. towards the E. ; this appears to 

 "have been the case to a remarkable degree in Liverpool in the year 1854^; 

 in other respects but little or no resemblance can be traced. Notwithstand- 

 ino- this apparent dissimilarity when thus illustra'.cd, it will be found, that if 

 the various winds, instead of being projected in tiie order in which they suc- 

 ceeded one another, are classified so as to show the relative amount of each, 

 for the difl'crent years, a remarkable coincidence is observable. A reference 

 * See Report of the British Association for 1844. 



