24 BULLETIN 257, U. S. DEPARTMENT OF AGRICULTURE. 
< By vol- By 
Distillation: ume. weight. 
Water io Pie eo A eee eee per cent.. 10.2 0.1 
dtigstdaght oils 40,1107 G23 ee 5 ee eee Colic Serie 4 
Second light ois: (110°-170° C.): 2. = ee ee do. 2.7 tt .8 
Heayy-ols (170°-2/0 -G>): -. see eee do... 123. 4 Zu 
Heavy ols (270° S15 U2. nee do.... 710.5 9.5 
Pitch Tessie 525s 6 ee eS Se ee Sere do.... 364.6 68.8 
OR es a ee do.--- 100.0° 99.6 
TABLE 17.—Analyses of asphaltic petroleums used on sections Nos. 2 and 4, Washington, 
DC. aos. 
Section Section 
No. 2. No. 4. 
Specific gravity 25°/25° SS 0.957 0. 936 
slash gomies = 3.03 fe eo Lee eS ee ee se ts 38 30 
anne point. so 2 < Sse ees Ce ee ee eee oe OME. 7 68 
Wiscosity, dnpler, o0:c. cat 26°C. “specific. 2 Sesh aac eee 104. 5-4 2.225 
Hows 5 hours at 163 Gee eras 2! 2 Sse ee percent.. 26.66 24.01 
“fieat test. oniresiiwe Biro -4o! (nme). 22. es 23 ae ee ee ee eet E: Lee ah ice 
idoat test-on tTesidue Bi DO? (lames 22-22: oe eee £ BOS A" AAS 
Percentage of total bitumen insoluble in . 86° Bj naplithas Ae 8.04 13.94 
Guxed searbon tees 202 fo eek ae ee SG oe aes ae percent.. 4.93 #210 
Solaiiein CS; (iotl bitumen) 2. G4 .e. te ae do. =.) 99-912 O9ee8 
Oremicmatier, asoluble.--0 5 352s ae anaes do. .~- . 07 .10 
HWOTeanICapatier Insoles. Soy =e oe Oe cores ee doce 02 01 
AN p gi aS net sR eg 8G A aglhne e,  e do.... 100.00 100. 00 
In the computation of cost data for the renewal surface treatment, 
shown in Table 18, the following unit prices were used: 
Laborer, per 74-hour day. -.-.-.---- ac nzoe op Beye es ero as Sere en ele ee $1. 75 
Cart, per Ta-hour fe Bs ASS ee 2 - 3. 50 
Sand -ericubic yard: On WORK. 2... . 2.502 0.4. ee 1. 64 
Bituminous material (per gallon): 
SETI SS ne re Sg yc ee Sa Se a ee . 100 
NCCHON 22 oboe secs ces as oe SORE cee Co Se ee eee . 099 
DOCHOMS soe s 2 5.2 Se ok. eS ee. Se aie oe ela eae ee ee . 085 
echo 4: So. 202k. 2S fe oe ee te eee ee ee 77:3 
Tasie 18.— Materials and cost data for renewal surface treatments, Department of Agri- 
culture Grounds, Washington, D. C., May 14-20, 1914. 
| | | Quantity of | 
|. materials | 
| per square | Cost per square yard (cents). 
| aya net 
i Jone nt i irre aah 
cane ee lee, tae eleg 
“ : > | 3 ieee x i$ oa Ouse ast =) | 
| Bituminous material. B | gal |e 3s +s SS os - 
| © =o [N= ee = | & jIgSul sg 3 
ae Se) ats i oe S | a jgs8iaa] o 
Bd S| Sael-erluer @ 1 ep | se ha 
Z| =. |28/_ 8188 wo | & lecselll | 3 
a | eee se ce & | = |legsgalse]s 
as eee eee ce = a 2 5 sas} a) 2 = 
m | } <= |; sees be RD oO Se a) = s 
1 | Water-gas tar preparation.; 1,363  0.177|0. 0063) 1.770 1. 035} 0. 205) 0.000) 0. 479 0.538) 6.034) 4. 061 
2 | Asphaltic petroleum -- <=. - 1,095; .137| .0063) 1.36 | 1.033} .234) .192 . 287; . 085} 3.521 4 
3 | Residual petroleum ......- 706, =.184! .0063) 1.565) 1.034 .165| -198 545). 4.217 ¥ 
4 | Asphaitic petroleum -..-.. 1,321, .145) .0065 - 133) 1 066) - 106; -123, 441) - 053) 3.381 
1 Clear. 
2 Clear, showed 0.0 per cent insoluble in dimethyl sulphate. : 
3 Soft, sticky, semisolid; a 315°-350° C. fraction showed 27.5 per cent, and a 350°-375° C. fraction showed 
32.5 per cent insoluble in dimethyl sulphate. 
