HYDROGRAPHIC TABLES. 



33a 



Table 24 H (continued). Change of topographic charts of isobar ic surfaces into isobaric 



charts in level surfaces. 



Example : Given the topographical chart of the 40 d-bars surface. Required the isobaric chart in 40 dynamic meters 

 depth. 



Table IVa shows the curve of 40.60 d-bars to be identical with the 39.409 dynamic meters curve, the curve of 40.61 

 d-bars to be identical with the 39.399 dynamic meters curve, and so on. 



