6 BULLETIN 586, U. S. DEPARTMENT OF AGRICULTURE. 
TaBLE 6.—Mechanical analysis of trap rock used in surface construction of experiments 
1, 2, 8, and 4. 
Trap rock 
for pene- 
tration. 
Trap-rock 
chips. 
Per cent. | Per cent. 
.6 
Retained !2-inchiscree nee ree sre eee = alma See aoe gece serine le eee see oe QO GN LS eecbece ee 
Passing 2-inch, retained on 13-inch screen...---.------------------------+------- B7Aitay acme eine me 
Passing 1-inch, retained on it-inch SCVOeny Ue) ANE INE elect cabioater Jab sete c/s = DSO oes: ae ae 
Passing 1}-inch, retained on ACIICHT SCEGCTIN Se rte aha, We Name eter ree nts $i ECM is Ee es 8 
Passing Linch, retained on FIM CHIScreemes sh oS ee OES eee cee a ee eee ee aie 1 15.0 
Passing # inch, retained on dinch SCLC .hareeiie us Soeeaneetwie it antstameeenes 2.4 36.0 
Passing 4 iinch, retained on Linch SOUS 6 soadaodosodssdsdsococesadeeasscooe ase 9 37.0 
Passing Linch, retained on 10-mesh SIEVO Sins Seino seems Sens seme ds aE cease 1.1 11.3 
(Passing O-meshisicvee senescent tteate seer er eee oe een eet eee eee eee anes Mee ee ee eee pres eee eee a7 
Motel Wie see ONS oo Ts Meee ees.) SORT eam fy eevee, oat | 100.0 100.0 
1 Passing +-inch screen. 
TABLE 7.—Analysis of refined tars. 
Coal tar, refined. W ater-gas tar, refined. 
Experiments Nos. 3 Experiments Nos. 1, 
and 4. 2,and 5 
Specific gravity 25°C/25°C.........-.------ 1.206 1.150 
inl oatitest On Claassen eee eee q 2/38” 2/34’" 
Soluble in CS, (total bitumen). -per cent. - 84.99 98. 28 
Mee Car DON een eee cece eee do...- 14.96 1.65 
Tnorganic residue upon ignition. -..- do...- -05 -07 
ees Per Per on Per Per 
Say ros ae ar- cent cent ar- cent cent- 
Distillation. acter. by by acter. by by 
volume. | weight. volume. | weight. 
WYGHIGRo Aaoc sgeesunboosc2c08ce6 sadosoqess -| Trace. 0.0 0.0 | Trace 0.0 0.0 
First light oils (to 110°C).....--..--..-----|--.-- do... 0 a) |bseee do... 0 :0 
Second light oils (110° to 170°C). ...------- Cloudy. =2 v-|ee2e% on .0 .0 
Heavy oils (170° to 270°C). ...--..---------|----- do... 10. 2 7.9 | Cloudy. 19.0 16.5 
Heavy oils (270° to 300°C).....-----------.|--.-- do... 10.0 Sail | eed ome 12.4 10.2 
IeILKG Nord ane ao otob oor oSOsHoraaabonoL aooNe Huse ose aS 79.6 is ish ledosseacee 68.6 73.3 
100.0 100.0 100.0 100.0 
TaBLE 8.—Analyses of petroleum products. 
Residual 
Oil asphalts. asphaltic 
petroleum. 
Experi- Experi- Experi- 
ment No. | ment Nos. | ment Nos. 
6 2and 4. 7 and 8. 
Specific gravity, DO S/QO ROS 32s eneg vate as sae cee eiereree aie See sates ee 1.040 1.053 0. 993 
IMoltin eM OINt COs sseciceelsleis ecle se tea wa yele ate eae ere eiocien er tnerae Hisemee oe 49 Giles. jlsogaobAReacS 
Mloatitestiato0cC (time) oes ese es ee eee enc een ceee | Risma ee cabs sleeecesetaceys 0/28" 
Specific viscosity Engler 100°C: 50CC Sx she Sees Sate eee eee eee acho tnd ememineetone 14.9 
Penetration at 25°C., 100 grams, DISOCE (2 oo eS Se eras 98 O8hy shifeee ee Ses 
Loss, 5 hrs., 163°C., 30 STATIS Pe SU aes aa aneen e teyna pene Centar. a Ol See acienciecoe 13.98 
Penetration of residue, as above.. Pee ie a 58 Cy Gaertn Metts See ie 
Per cent of total bitumen insoluble in 86°B naphtha. ohuasaee eee eames 27.70 30. 05 18.88 
Mixed (Carbon eee susctc ccc ces ntee heen ae cee eens 17.25 18. 85 9.96 
Soluble in CS. (total bitumen) ae 99. 80 99. 80 99. 93 
Organic matter insoluble ........-.........-. immerse edoses= 09 -17 -07 
Inorganic matter insoluble 11 03 00 
100. 00 100.00 100.00 
