October 31, 1884.] 



SCIENCE 



419 



imperfectly understood. In continental Europe 

 they have not attracted attention; but in Scotland 

 and Ireland they are numerous and well known. 



in fig. 3, from a manuscript map by the author. Fig. 

 5 is a view of Corey's Hill, a few miles from the city, 

 in the town of Brookline ; and fig. 6 represents some 





Fig. 2. 



Fig. 3. 



Fig. 1 shows a remarkable group of them in north- 

 western Ireland, taken from a map prepared by 

 Messrs. Kinahan and Close. In this country they 



of the harbor islands, nearly all of which are drum- 

 lins, more or less cut away by the waves. A great 

 series of these drift-hills stretches through central 



35s£ 



ijLJuI 



Fig. 4. 



have received careful study by Prof. C. H. Hitchcock Massachusetts into Connecticut, but its limits have 

 and Mr. Warren Upham, of the New-Hampshire never been studied. Two of them at Charlton, on 

 geological survey. Fig. 2 is copied from the south- the Boston and Albany railroad, are drawn in fig. 7. 



Fig. 5. 



eastern corner of their map ; and fig. 4 presents a 

 sketch of a few of these hills near the Merrimack, 

 in the neighborhood of Amesbury, Mass. Around 

 Boston they are again well developed, as illustrated 



Again in New- York, between Syracuse and Roches- 

 ter, elongated drift-hills, that probably deserve the 

 name of drumlins, may be seen in great numbers: 

 here they have entire control of the topography, and 



