418 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 51 



Table I. Fundamental table of mean values for each circle of latitude * 



♦The numbers here given under D ami I often differ somewhat from those given in the above 

 quoted former edition of this memoir. The reason for this lies in the fact that the interpola- 

 tions have been executed much more carefully for this table than in the memoir XIII above 

 referred to, where only an approximate statement was desired. 



The tables and curves relating to the individual elements in these 

 two methods of presentation are so arranged as to bring out most 

 clearly the relations between their relative progress. In order to 



