36 



Fishery Board for Scotland. 



(3) the very marked increase in the maximal temperatures as com- 

 pared with the more westerly line. 



My last two diagrams (Figs. 31 and 32) represent (as I have 

 already said) the same data as are shown in the corresponding- 

 diagrams of the foregoing series, hut translated here into the form of 

 " anomalies," or differences as compared with the conditions of the 

 meridian of 15° W. In the case of the meridian of 10" W. (Fig. 31), 

 the diagram has two vertical axes of symmetry, one in January, the 

 other in July, corresponding approximately to the seasons of maximal 

 and minimal temperature. It will be noticed at once that the 



65 - 



60' 



55 - 



Fig, 30.— The same for 5° E. 



largest departures from the temperatures of oceanic standard of 

 comparison lie a little to the southward of 55° N., that is to say, 

 where the line of the diagram comes closest to the Irish coast. Here, 

 in summer time, the surface temperature of the sea is about half a 

 degree centigrade higher than in the open ocean, five degrees to the 

 westward ; but in winter time the sea temperature is over two degrees 

 colder than in this latter meridian. In the upper half of our diagram, 

 north of 57° or 58° N., and therefore free of the coastal influence of 

 the British Islands, the temperature differences from the more 

 westerly meridian are extremely small, being less than half a 



