Jron, -for burning Tioles. 





ActaaZ thtckness 

 of walls ofTioof. 



m:.^ 



■=r3r--vsr:: -i- 



QvuxrtEr-crach^with, cross ait. 



The, clarrq} artcZ nazL remedies ojJvUecU. 



Tot crajcJz. WaH rernjoved, to s?iow 

 absorption^ of cofTin 7?one 



'Treated bu acunping tvit/hnaUs. 



QncuJtedU walls. 



One effect of Quxirter-CrojcJ^, 



QUARTER-CRACK AXD REI^IEDIES. 



