4-96 Mr. W. R. Birt o» Atmospheric Waves. 



Table III. — Exhibiting the principal lines of the greatest diminu- 

 tion of pressure of the S.W. system of waves, Nos. 1, 3, 5, 7, 9, 

 11,13,15. 



Table IV. — E.\hibiting the principal features of the waves of the 



N.W. system Nos. 2, 4, and 6. 



Wave No. 2. 



Epochs. 



Nov. 1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 

 9 

 10 



11 

 11 



Crest. 



Crest. 



Crest. 



Crest. 



Crest. 



Crest. 



Crest. 



Crest. 



Crest. 

 Post. Trough. 

 Post. Trough. 



Crest. 

 Post. Trough. 



Directions and Localities. 



N.W. of the United Kingdom .. 

 N.W. of the United Kingdom .. 

 N.W. of the United Kingdom .. 

 N.W. of the United Kingdom .. 



From Cork to the Orknevs 



S.E. of Belfast '. 



S.E. of the Orkneys 



Passes Plymouth 



S.E. of Paris 



Passes the Orkneys 



Near the eastern coast of Ireland 



extending to Christiania 



Considerably S.E. of Paris 



Passes Plvmouth 



30-49+ 



30-55 



30-51 4- 



30-43+ 



3013 



29-90+ 



28-80 



29-24 



29-12 



Anterior Posterior 



Slope. Slope. 



N.E. 



N.E. 

 N.E. 



N.E. 

 N.E. 

 N.E. 



S.W. 



.w. 

 w. 



Wave No. 4. 



Nov. 17 

 18 

 19 



Nov. 21 

 22 

 23 

 24 



Crest. 

 Crest. 

 Crest. 



Passes Belfast 



Passes London 



Considerably S.E. of Paris 



30-51 

 30-53 



N.E. E. 

 N.E. 



S.W. 



Wave No. 6. 



Crest. 

 Crest. 

 Crest. 

 Crest. 



N.W. of Belfast and Cork 



Near Cork, Belfast and Orkneys 



Passes London 



Near to or S.E. of Paris 



2958 

 29-59 



N.E. 



S.W, 

 S.W. 





