O 1:3 MORTAR SPECIMEN 



o 









a 









§ 









8 









s 





















a 









S 



















s 



























S 





— — 













-; 





WATt 



R 



RED 





— jr 





— + 



=*= 



O 











+ 





































































jj O000J 

































































£ ooooi 













o 



— J. 



30 



LI 



— — 





D 





cr 





1 — 















— B 



























































D 

















































































































































































































































z 0.000J 



a 



S &0004 





vf 

































































































































































































































c 





\+ 





























































































































































































































0.0007 



z 



3 0.0008 





















AIR 



■ure 







































































































+v 





+ 













o 

















c 



l — 





























































































-a— 



+ 





















4 







3 





























































00009 





1 













1 









00010 

 0.0011 





































































































































































































































Fig. 4. — 1 : 2 and 1 : 3 mortar, stored in air and also in water. 



80045°— 17— Bull. 532. (To face page 6.) No. 1. 



