Considerations on the Problem of Latitude Variation. 



11 



His result at Strassburg (1892-94) was exi^'ossed in the 

 following résumé : ^^ 



The epoch of daily miniiuuui or southern elongation nï tlie 



pendulum lies generally l)etween 5'' and 6''. The daily 



maximum or northern elongation comes always in the 



morning between lS''-20'', or slightly later in winter. The 



amplitude varies l)et\veen 0. "1 and 0. "2. 



After the early death of von Rel)eur, Ehlert took chai'ge of 



the observations at Strassburg (1895-9(')). His result was quite 



similar to that of his predecessor, as may be seen from the table 



l)elow."^ 



Tap.le IV. 



1) (3! erlands Beiträge zur Geophysik, Bd. IL 

 2i Ditto Bd. IV. 



