1894.] 199 fWoo.hvortl,. 
by GilViert in his monograph on Lake Bonneville. A few other 
terms are explained in the connection in which they appear. 
Bibliographic Resume. 
The following publications relate to the distribution of eskers 
in this district. 
Prof. Edward Hitchcock^ early recognized the resemblance of 
the eskers of this district to the osar(s) of Sweden and Russia 
and to the "escars" or "scoeurs" of Ireland. In various works 
he published a map of the eskers near the Shawsheen River in 
Andover. 
Gray and Adams^ give a map of the Andover eskers, and refer 
them to "oesars." 
Prof. G. F. Wright^ has described and mai)ped the Andover 
and other eskers in north-eastern Massachusetts, under the name 
of kames, and has attempted to show the connection of groups of 
these deposits in a continuous system. He advocates tlie super- 
glacial origin of eskers. 
Althougii the Andover eskers have been repeatedly described 
and mapped, beyond referring them in the later accounts to a 
superglacial origin the several authors have noj. brought out 
other relations which these deposits may have borne to the ice- 
sheet. 
The eskers of Hingham have been pointed out by Prof. W. O. 
Crosby* and Mr. T. T. Bouve,^ under the name of kames. They 
"occur along the side of Weymouth Back River, north of Great 
Hill, and in the vicinity of Gushing and Accord Ponds." To 
one of these deposits Professor Crosby ascribes the diversion of 
Weir River from a preglacial valley into ISTantasket Harbor. 
Mr. Bouve describes their course, argues for their superglacial 
origin, and notes the eastward trend of the ice-sheet as indicated 
by the corresponding direction of one of the group. 
1 Elementary geology. 
2 Elements of geology, New York. 1853, p. lU-115. 
3 Kames and moraines of New England, Proc. Bost. soc. nat. hist., v. 20, ji. 210- 
220.— Bailey, Historical sketches of Andover, Mass., 1880, p. 19-24. 
4 Physical history of the Boston Basin, 1889-90. Second lecture. 
* Geology of Hingham. 
