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BULLETIN 949, U. S. DEPARTMENT OF AGRICULTURE. 



(Name and location of laboratory.) 

 Report on Sample of Portland Cement. 



Laboratory No. 

 Brand 



(Date reported.) 



., 192. 



Identification marks 



Submitted by 



Sampled , 192. 



Sampled from 



Quantity represented 



Manufactured by 



Location used or to be used 



Examined for 



Title Address 



Received , 192. 



Remarks: 



TEST results. 

 Chemical tests: 



Loss on ignition, per cent 



Insoluble residue, per cent 



Sulphuric anhydride (S0 3 ), per cent. 



Magnesia (MgO), per cent 



Physical tests: 



Specific gravity 



Per cent retained on 200-mesh sieve . 



Steam test 





Gillmore 

 needle. 



Vicat 



needle. 



Initial set or 





Final set or 





Tensile strength (1 : 3 Ottawa sand): 





7 days. 



28 days. 



Average: 



Respectfully submitted, 



Average: 



(Title;. 



