57 6 REVIEWS 



The general temperature charts are based upon fifteen years' 

 observations from 1539 stations. The general pressure charts from 

 fifteen years' observations at 1280 stations. These reports are the 

 summaries of about 17,000,000 observations for temperature, and 

 about 14,000,000 for pressure, and this is excluding all observations 

 at sea. 



The charts of the first part under the general heading Climate, are 

 classified under the headings : 

 I. Isotherms. 

 II. Isobars and wind arrows. 



III. Isotherms and Isobars month to month. 



IV. Isohels, the year's sunshine for Europe and North America. 

 V. Isonephs, distribution of cloudness over the globe. 



VI. Isohyets, annual, seasonal and monthly rainfall over the globe. 

 VII. Maps of hyetal regions and seasonal distribution, 

 VIII. Isobars and Isohyets ; rainfall as related to pressures. 



The second part on Weather, has charts classified as : 

 I. Abnormally cold and hot seasons and months. 

 II. Pressures as related to wind in type storms. 



III. Pressures as related to types of wind and weather. 



IV. Storm tracks and storm frequency. 



V. Type deviations from normal pressures. 



The first chart in the volume shows the world's isotherms on Mer- 

 cator's projection, in which the relief of the land is shown by line 

 shadings in black. Contours of 600, 3000, 6000, and 12,000 feet 

 are shown, and similar contours in the oceans represented by fine 

 dotted lines. Even the little 3 X 6 inch insets show all highlands over 

 3000 feet by shading. This plate and No. it, the world's isobars, are 

 equally beautiful, and are the finest plates in the book. It will be no 

 exaggeration to say that no more beautiful plates have ever been 

 engraved. They are magnificent in accuracy, neatness, completeness 

 and beauty of engraving, nor are the lesser maps less beautiful, 

 they are merely smaller, and chart less complex data as a rule. One 

 is struck, too, by the artistic range of coloring. The tints show 

 with a sufficient contrast the varying values of the data charted, yet 

 there is not a harsh note in the whole book. 



Two of the most beautiful plates in the book are the charts of the 

 monthly isotherms of the British Isles, and another of the monthly 

 isobars and isohyets. 



