260 



REPORTS ON THE STATE OF SCIENCE, ETC. 



of factors by which the exact results are presented. The last chapter 

 deals with indications of the methods of calculating geothermal gradient 

 and geothermal degrees. A table of geothermal degrees taken from B. 

 Gutenberg's book {Handbuch der Geophysik, vol. 2, pp. 1—7, Berlin, 1931) 

 and a list of sixty-four books of reference are added. 



In these abstracts the geothermic gradients are differently expressed and 

 the following table will be useful for converting from one standard to another. 



Geothermic Gradients. 

 (Conversion Table.) 



