Upham.] : 224 : [April 2, 
Examples of these drift hills, which are probably familiar to you 
all, are Beacon hill in Boston; Bunker hill in Charlestown; Breed’s 
Island hill beyond East Boston; Green hill in Winthrop; Powder 
Horn hill in Chelsea; Mt. Revere; Mt. Washington in Everett; 
Tufts College hill; Winter hill and others in Somerville; Bigelow 
hill in Brighton; White’s hill in Watertown; Owl hill in Waltham; 
Mt. Ida, Prospect, Institute and Oak hills in Newton; Corey’s and 
Walnut hills in Brookline; Parker’s hill in Roxbury; Bellevue and 
the Clarendon hills in West Roxbury; Brush hill in Milton; Jones’ 
hill, Mt. Ida, and Pope’s hill in Dorchester; Wollaston Heights, 
Forbes, President’s, and Great hills in Quincy; Great and King Oak 
hills in Weymouth; Baker’s, Otis, Prospect, and Turkey hills in 
Hingham; Scituate and Bear hills in Cohasset; Strawberry and Tel- 
egraph hills in Hull; and the hills of Deer Island in the harbor. 
These include only the most prominent examples found in this dis- 
trict, and after noticing the features that mark this class of hills, we 
have a very formidable descriptive list, with exactly determined or 
approximate heights, of these and more than a hundred others simi- 
lar to them that occur within the same area. 
These hills vary in size from a few hundred feet toa mile in length, 
with usually half to two-thirds as great width. Their height, corre- 
sponding to their area, varies from twenty-five to two hundred feet. 
But whatever may be their size and height, they are singularly alike 
in outline and form, usually having steep sides, with gently sloping 
rounded tops, and presenting a very smooth and regular contour. 
From this resemblance in shape to an elliptical convex lens, Professor 
Hitchcock has called’ them lenticular hills, to distinguish these depos-_ 
its of till from its broadly flattened or undulating sheets, which are 
common throughout New England. 
The trend, or direction of the longer axis of these lenticular hills 
is nearly the same for all of them comprised within any limited area, 
and is approximately like the course of the striae or glacial furrows 
marked upon neighboring ledges. In eastern Massachusetts and New 
Hampshire, within twenty-five miles of the coast, it is quite uni- 
formly to the south-east or east-south-east. Farther inland, in both 
of these states, it is generally from north to south or a few degrees 
east of south; while in the valley of the Connecticut river it is fre- 
quently a little to the west of south. In New Hampshire, besides its 
accumulation in these hills, the till is frequently amassed in slopes of 
