Long Waves in Canals and Standing Waves in Closed Basins 183 



Table 23. Observed and computed values of the period 

 of several lakes (in minutes) 



T, 



T, 

 T 3 

 T 4 

 T 5 

 T 6 



14-52 

 8 09 

 601 

 3-99 



3-54 

 2-88 



14-50 

 814 

 5-74 

 4-28 

 3-62 

 2-93 



14-76 

 8-36 



918 

 515 



9-14 

 510 



915 

 5-18 



42-92 

 28-58 

 21-79 

 14-95 

 1207 

 9-87 



74-45 



35-1 



280 



(1) According 



(2) According 



(3) According 



(4) According 



(5) According 



(6) According 



(7) According 



(8) According 



(9) According 



(10) According 



(11) According 



(12) According 



(13) According 



to Chrystal's method (Chrystal, 1908). 



to Hidaka (1931). 



to Chrystal and Mclagan — Wedderburn (1905). 



to Defant (1908), also Vercelli (1909). 



to Proudman's method. 



to Hidaka (1932). 



to Chrystal's method (Bergsten 1926). 



to Defant's method. ) 



to Chrystal's method, 

 to Ertel's method, 

 to F. Servais (1957). 

 to Defant's method, 

 to Hidaka's method. 



Fr. Defant (1953). 



F. Servais (1957). 



neglected. This proves that these secondary influences are really unimportant 

 in comparison to the importance of the configuration of the basin. The most 

 careful and thorough analysis of the seiches in a great lake has been given 

 by Bergsten (1926) in his work on the seiches of Lake Vattern (Sweden). 

 On account of its narrow, uniform shape and its great length of 124 km, 

 this lake was particularly well-suited for the investigation of the variations 



