Jan. 9, 1879] 



NATURE 



Ixxv 



SCIENTIFIC CHRISTMAS PRESENTS. 



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THE 



QUARTERLY JOURNAL OF SCIENCE. 



Edited by WILLIAM CROOKES, F.R.S., &c. 

 Now ready. No. LXI., yanuary, 1879, price y. 

 CONTENTS. 

 I. On the Thickness of the Antarctic Ice, and its Relations to that of 

 the Glacial Epoch. By James Croll, LL.D,. F.R.S. 

 II. Gravitation as a Factor in the Organic World. By William Crookes, 

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III. Sanitary Science in the United States : its Present and its Futtire. 



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Notices of Scientific Works, Obituary, &c. 



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