008. 

 006 



004 

 OOI. 



^.r ;i . 



m Ju'iiI , i.I , il Jjlllliililil.il. iii li I. 



LiLlL. Li i.i.i.i. 



MAY2e'l4-J c MAY -27, 1914- 



MAY 28 MAY 29 



JUNE 3, 191-4 



JUNE 5, 1914- 



.JUNE 8.1-4 



"~nnrp 



fTH^ifiiir TPTn 



tTJ 



APRIL 1-4,1014 



APRIL ie'14-l APPIL 17 '14. 



T ^- Tr Hl T L., T l r ilrll llllljli illliL III ll .1... II, I uil 



Trq^(^p|r 1 M|n ~^ Ja 



TP"nin| 



Vu 





JULY 3 ,1913 



AUGUST 191,1913 



JUNE 17,1913 

 , 90" r. 



JUNE IS , 1913 



APRI L 21 ,1314- 



—,..1.1 1,1,11 



' |IT l'l'|l "'H'Tl'l" III 1 I 1 l|' 



WV u 'lSW l l' 



"pninr 



| iil"i iiji f i n 1 ii 1 ITU 'i|ii r '|pp-^-^fii 



-irr^Y~ J ~ 



FEBRUARY S , 1913 



FEB. 11,1913, FEB. 6 ,1913 



FEB. IO, 1913 



JULY 1,1913 



LAYOUT OF EXPERIMENTAL SECTIONS 



NOV. 14.1912 

 54° F. 



NOV 16 12 I NOV. 18 

 52°F. 47° F. 



NOV. 22 

 59°F. 



NOV. 25 



n 



NOV. 26,1912 

 46 T 



DEC. 7,1912 

 54-° F. 



MAY 20 , 1913 

 6S*- 80° F. 



NOV.8'12— »■* NOV. II,I9I2-»J*N0V.I24«— NOV. IG->f*-NOV. 20— *■■* NOV. 22, 1912 »4«N0V.25 



26,1912-"-) [*— APRIL 23 'l3->«-APRIL 22» 



-^LAID NOV.5,191 



I O 10-20 30 40 50 60 '70 80 90 100 110 ' »0 19° J 0O 2|p 22fl' 230 240 290 260 270 280 290 300 310 '320 330 340 '350 360 "370..3fla> 



| PLAIN CEMENT I PLAIN CEMENT IplAIN CEMtNTJ OIL CEMENT PLAIN CEMENT PLAIN CEMENT I OIL CEMENT | OIL CEMENT I 



GRAVEL AGGREGATE LIMESTONE AGGREGRATE. GRAVEL AGS. GRAVEL AGS. GRAVEL AGG. | LIMESTONE AGGREGATE LIMESTONE AGS. I TRAP AGG. | 



Fig. 13. — Expansion and contraction of concrete road, Connecticut Ave. extended, Chevy Chase, Md. Laid in 1912 and 1913. 

 80045°— 17— Bull. 532. (To face page 16.) 



