APPENDIX. 



'The fifth colmnn exprefles the difference between this 

 mean height, and 60°, the height of the thermometer at 

 London v/hen the pendulum was adjufted. 



The fixth column (hews the contraction of the pendulum 

 rod by the degree of cold expreffed in the fifth column, 

 according to Mr. Smeaton's experiments, publifhed in 

 N° 79 of the Philofophical Tranfadions for the year 



•17 54- 



The feventh colujnn fhews how much this contraction 



would make the pendulum gain during each period of the 



fecond column. 



The eighth column iliews how much the pendulum 

 'would have gained on the watch in each period, if the 

 thermometer had remained at 60°, and therefore no con- 

 traction of the pendulum- rod had taken place. 



The ninth column fhews how much the watch ought to 

 have loft in each period, allowing it to have loft uniformly 

 at the rate of four feconds in twenty-four hours, as was 

 obfervcd by the tranftt. 



The tenth column (hews how much the pendulum would 

 have gained on the watch, in each period ; allowing for 

 its loling at the rate of four feconds in twenty-four hours, 

 and fuppofmg the thermometer to have remained conftantly 

 at 60°. 



The eleventh column fhews how much the pendulum 

 would gain per hour according to the rate of acceleration 

 given in the tenth column for each period. 



TABLE 



