378 = 7. C. Chamberlin—FHillocks of angular Gravel 
shut blinds can be easily arranged as mentioned above, the 
blinds being widened if necessary to cover the shelter ‘with 
their shadow. Experiments are still being carried on upon 
this matter. The Chief Signal Officer has kindly permitted 
the publication of these results preparatory to a more ex 
haustive study. 
Art. XLIV. Ean ad Angular Gravel ie Disturbed Strati- 
fication; by T. C. CHAMBE 
MucH interest has tes awakened in recent years in the pe- 
culiar gravel mounds and ridges—in part embraced under the 
terms Kames, Bakers and Osars—which are disposed in varying 
frequency over a large part of the drift areas of both the eastern 
and western continents. Numerous writers, foreign and native, 
have made descriptive and theoretical contributions to the lite- 
rature of the subject.* With increased attention there has 
* Among these the following may be cited as having more ie less immediate 
relevancy to 2 present topic: Edw. Hitchcock, Geol. of Mass. 184], Trans 
ssoc. Am, Geol. and Nat., 1840-42, Smith. Cont. es 1857; i, W. Mathes 
Geol. of N. Y. lst Dist, 1842; J. Hall, Geol. of N. Y., 4th Dist 842; L. 
Vanuxem, Geol. of N. Y., 3d Dist, 1842; Ch. Martins, Bulletin de "ia coat 
uy Chambers, T. dete 
rege at 1850, a tes we w Phil. Journal, 1853, liv, 229; T. F. Jamieson, 
- Drift a 
860, xvi wg Ad tes. ibid, 1865, xxi, p. 161, also se 1874, p. 329; 
H. phic ee nd Geol. of Maine, 1861, pp. 271 274, 1862, pp 388-391 ; 
Geol. of New rabies iii, 1878; G. H. Kin ahan, On the Eskers of the Central 
Plain of rcleane <i Geol, Soc. Dublin, 1863, x, p. 109, also Dublin Quar. Jour 
., 1864, iv, p. ., 187 ; C. Whitulesey, Fresh ve ter 
pai eae Bi the North Western States, S$ mith. ’ Contrib’s, 186 
mena in hecere Geol. Sket oe ae p. 101 (originally in ‘Auantie aoe 
Phe 
Monthly, xix, “Feb., 1867); A. Erdmann, Exposé des formations quaternaires ci voy 
rdmann, Ex 
ms beanie? gt N. H. Winchell, Surface Geol. of Northwestern Ohio, Proc 
xxi, D- 65, also Geol. Reports of Minn. and Ohio; D. 
Rallsténsiidaingar ; K. Svenska, Vet. Akad : Mandingen 1874; James pe é 
Great Ice 1874, pp. 201-237, Riv. Ed, 1876, Kames, pp. 210-229 
The 
Eskers, 395-6, syed 407-409; J. S. Newberry, Geol Survey of Ohio, vol th 
4, p. 41, vol. iii, 1878, 40; N. 0. Holst, Om de Glaciala faggot ea 
, Geol. f6 h ns. W ce. 
Origin of Kames or Eskers in New Santee fic Am. Assoc 
i G. F. 
xix, 47, also, The Kames and Moraines of New En 
ALS, Packard, Glacial Marks on the "Pacific and pene coasts sntees 
Nat., 1877, xi, ie E. Or os Surv. ms! peg vol. iii, 187 
: WwW 
? 
