12 
PARK AND CEMETERY. 
TOP COURSE — Upon the above described founda- 
tion shall be placed a layer of broken limestone of 
the same quality as that above described and of 
sufficient depth to bring' this layer to a uniform 
finish, free from irregularities and depressions to 
the established cross-section as shown upon the 
plan for said improvement heretofore approved by 
the Board of Park Commissioners. The stone in 
this layer shall be broken so that the greatest 
surface upon all parts of the roadway. The lime- 
stone screenings shall be clean and free from all 
clay, dirt or other foreign matter, and of such 
size and quality as shall be acceptable to the 
Board of Park Commissioners. 
DRESSING — The surface of this top layer shall 
then be brushed clean of all dust, dirt or loose 
particles of macadam, and then receive Jjn appli- 
cation of a clean petroleum residuum which shall 
BEFORE AND AFTER PARKING 38TH ST. — MAPLE ROAD, INDIANAPOLIS. 
dimension shall not exceed two and one-half (2 %) 
inches and shall not be less than one and one- 
quarter (1 V 4 ) inches, and of this material from 
sixty (GO) to seventy-five (75) per cent, shall not 
be more than two and one-half (2%) inches in 
its greatest dimension, and its least dimension 
shall be not less than two (2) inches. This layer 
shall be thoroughly compacted by rolling and all 
defects corrected before spreading any limestone 
screenings upon the same. 
There shall then be cast upon this layer from 
the sides of the roadway a sufficient quantity of 
clean limestone screenings to completely fill all 
interstices. This layer shall then be flooded and 
rolled to the satisfaction of the Board of Plark 
Commissioners and until it is compact and solid 
and ceases to creep under the action of the roller, 
and until the screenings and water flush to the 
have a specific gravity of from 90 to 91, which shall 
thoroughly cover the surface of the roadway to the 
satisfaction of the Board of Park Commissioners. 
Upon the drying in of this application of oil, 
there shall he applied upon this surface a dressing 
of oil and refined^ asphalt. This mixture shall con- 
sist of 70 per cent oil and 30 per cent refined 
asphalt, which shall each respectively conform to 
the specifications which follow: 
OIL — The oil shall be a semi-asphaltic residuum, 
which shall have a specific gravity of 94/100 to 
98/100 at 77 degrees Fahr. It shall not flash 
below 350 degrees Fahr. when tested in the New 
York State closed oil tester, and shall not vola- 
tilize more than 5 per cent of material when 
heated five hours at 325 degrees Fahr. in a tin 
box 2 % feet in diameter, as officially prescribed. 
The residue, after heating, shall flow at 77 degrees 
Fahr., and shall be homogeneous and shall show 
no coarse crystals. 
REFINED ASPHALT— The refined asphalt to be 
used shall be derived by either of the following 
methods: 
1. By heating, if requiring refinement, crude, 
natural, solid asphalt, to a temperature of not 
over 400 degrees Fahr. until all the water had 
been driven off. Crude, natural, solid asphalt shall 
be construed to mean any natural mineral bitumen, 
either pure of mixed with foreign matter, from 
which, through natural causes lin the process of 
time the light oils have been driven off until it 
has a consistency harder than 100 penetration at 
77 degrees Fahr. At least 98% per cent of the 
contained bitumen in the refined asphalt which is 
soluble in cold carbon disulphide, shall be soluble 
in cold carbon tetra-chloride. Such asphalt must 
melt readily upon the application of heat. In 
no case shall it be prepared at the refinery with 
any product not hereinafter provided for. 
2. By the careful distillation of asphaltic petro- 
leum until the resulting residue has a consistency 
of from 30 to 45 degrees penetration at 77 de- 
grees Fahr. 
a. The solid residue so obtained shall be 
soluble in carbon tetra-chloride to the extent of 
98% per cent. 
b. Its bitumen shall yield upon ignition not 
more than 13 per cent of fixed carbon. 
c. When 20 grams of the material are 
heated for five hours at a temperature of 325 
degrees Fahr. in a tin box 3% inches in diame- 
ter, after the manner officially prescribed, it 
shall not lose over 5 per cent by weight nor 
shall the penetration at 77 degrees Fahr. after 
such heating be less than one-half of the 
original penetration. 
d. A briquette of the solid residue having 
a cross section of one square centimeter shall 
have a ductility of not less than 30 centimeters 
at 77 degrees Fahr. 
The oil and asphalt of the kinds and in the pro 
portions above specified shall be thoroughly mixed 
together and applied to the road at a temperature 
of not less than 280 degrees Fahr., and in sufficient 
quantities to cover all parts of the pavement and 
until the oil and asphalt mixture appears and 
remains on the surface of the road, which will 
require at least 1% gallons to each square yard 
of pavement. The oil and asphalt dressing must 
be applied evenly and uniformly over the entire 
surface of the pavement, and in a manner accepta- 
ble to the Board of Park Commissioners. 
After the application of the oil and asphalt the 
surface of roadway shall then be covered with 
a sufficient quantity of clean limestone screenings 
% inch to % inch, free from dust, to absorb all 
excess oil and to completely fill all interstices, and 
shall then be rolled to the satisfaction of the Board 
of Park Commissioners and until it is compact 
and solid and ceases to creep under the action of 
the roller. The limestone screenings shall be clean 
and free from all clay, dirt or other foreign mat- 
ter, and of such size and quality as shall be 
acceptable to the Board of Park Commissioners, and 
shall be cast on the surface of the pavement from 
thd sides of the roadway. 
In, all the above layers of courses the depres- 
sions must be filled and all defects in grade or 
cross-section shall be corrected as the rolling 
progresses. 
All of the material used in doing the work 
provided in this contract and the manner of doing 
the work thereunder shall be subject to the ap- 
proval or rejection of the Board of Park Com- 
missioners. 
The contractor shall designate the kinds of 
asphalt and oil he proposes to use; and shall sub- 
mit samples to the Engineer that the same may be 
tested before the material is delivered on the work. 
ROLLING — All the rolling above specified shall 
be done with a steam road roller weighing not 
less than ten (10) tons. 
GRADING LAWNS — The lawns shall be graded to 
conform with the roadway and curb according to 
the general cross-section of the work as shown on 
drawings, and dressed with fine earth; the gutters 
shall be carefully shaped according to the general 
cross-section and sodded with clean blue grass sod, 
to width shown, properly tamped or rolled. In 
constructing lawns the coarser material shall be 
deposited in the embankment as above stated under 
heading “Embankment.” No gravel or sand will 
be allowed to remain on surface, and in the case 
of cuts should gravel, sand or stony earth appear 
at the elevation for the surface of the lawns, the 
contractor shall be required to remove such sand, 
gravel or earth to any depth not greater than 
two (2) feet below surface, which the Board 
may deem necessary, and refill to proper grade 
