APPENDIX B 255 



The twelve points thus fixed are connected by lines, thus forming a closed 

 figure. In order to provide some standard of reference by which to judge 

 whether the graph of a given place is favorable, Taylor adds to each of his 

 climographs a standard graph based on twelve large cities in regions where 

 the white man prospers. This is an admirable method of bringing out the 

 salient characteristics of a climate. 



The form of climograph used in the present paper was suggested by Mr. 

 W. D. Pierce in a valuable paper on "A New Interpretation of the Relation- 

 ships of Temperature and Humidity to Insect Development" (Journal of 

 Agricultural Research, vol. 65, 1916, pp. 1183-1191), but it is modified by 

 some features taken from Taylor's method. Pierce's climograph pertains to 

 the cotton-boU weevil. It is based on the number of days required for develop- 

 ment of that insect under different conditions of temperature and humidity. 

 Although Pierce does not use the term "isopract," his terminology suggests it. 



The climographs of both Taylor and Pierce are reproduced and described 

 in The Geographical Review, vol. IV, November, 1917, pp. 4i02 and 403. 



SUPPLEMENTARY NOTE 



After the final proofs of this book had gone back to the printer the author 

 learned that in The Cairo Scientific Journal, No. 50, vol. IV, November, 1910, 

 Dr. John Ball published an article entitled "Climatological Diagrams." In 

 this he used the same form of climograph that Taylor later developed more 

 fully in Australia, except that Ball used dry bulb temperatures where Taylor 

 used wet bulb temperatures. Hence, while Taylor apparently introduced the 

 term "climograph" in this connection and was the first to apply the method 

 on a large scale, the method itself should be ascribed to BaU. 



