8 
only cost to the college being the freight on the same. In 
table of cost, however, the regular price of the stone has been 
inserted. This stone ranks high according to the tests made 
by the Massachusetts Road Commission and many cities with 
complete crushing plants buy it for surfacing and even, in some 
cases, for all purposes. 
The roller used was owned by the city of Dover, N. H. It 
is of stone and weighs 3700 pounds. It was kindly loaned for 
the purpose of the experiment by Mr. Isaac L. Lucas, Superin- 
tendent of Streets. 
Of the graveled portion 62^ feet at the west end and 
12^ feet east from macadamized part were graded in full 
with gravel drawn a distance of a little less than one mile, 
while the remaining 100 feet were surfaced with the same ma- 
terial. The grade for foundation of this last 100 feet was 
excavated from the side of the road. To drain the east half a 
ditch was dug along the south side for a distance of 160 feet, 
with an average depth of three and one-half feet below finished 
surface at centre. A three inch tile was laid and the ditch 
filled to within six inches of the surface with small stone, care 
being taken to protect the tile from crushing. The surface 
was covered in with gravelly loam excavated from the side 
ditches. To secure an outlet, a larger bell pipe was laid across 
the road extending a total distance of 81 feet. To obtain a 
suitable depth of ditch five charges of dynamite were employed 
and considerable rock was removed by wedges. No drainage 
on the north side was considered necessary. 
The following table gives the details of each separate part of 
the work. Team work has been reckoned at $3.50 per day and 
day labor, $1.50. Supervision has been estimated on basis of 
taking a suitable number of men and teams and doing the 
work. On account of pressure of farm business the actual 
work was spread over a longer period than supervision covers. 
