Supplement to "Nature" July 29, 1922 



Rawdon, H. S., and Lorentz, Marjorie G. Metallo- 

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Astronomy 



Bigourdan, G. Union Astronomique Internationale. 

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Stj^rmer, G. Notes Relatives aux Aurores Boreales. 

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Meteorology 



Dijk, Dr. G. van. Activity of the Earth's Magnet- 

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 284-23 tables. (Utrecht: Kemink en Zoon, 1922.) 

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Hazard, D. L. Results of Observations made at the 

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Kendrew, W. G. The Climates of the Continents. 

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Peppier, Dr. W. Die Beobachtungen der Marine- 

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Mineralogy 



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Geology 



Hecker, Prof. Dr. O., Herausgegeben von. Veroffent- 

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