Twenty-second Annual Meeting. 



18 



slab and left until the cement was stiff enough to be taken out of it; after 24 hours 

 in air the brickets were placed in the water box and left until broken; they were 

 broken immediately after being removed from the water. 



The Kansas City and Fort Scott cements were purchased from a cement dealer 

 in Kansas City. The Portland is an imported cement purchased from Grovenor & 

 Son, Lawrence, Kansas. 



One hundred and fifteen specimens were made, one hundred and five of which 

 were broken, and go to make up the estimates. They were broken in an Olsen 

 cement-testing machine of 2,000 pounds capacity. 



The sand used in making some of the brickets is Kaw river sand. It was sifted 

 through sand sieve No. 20, 400 meshes (Stubb's No. 28 wire) to the square inch. 

 The portion which passed through the sieve was used. 



The fineness was tested by weighing one pound of the cement, sifting it through 

 •cement sieve No. 50, 2,500 meshes (Stubb's No. 35 wire) to the square inch, and 

 weighing the portion which did not pass through the sieve. The ratio of the weight 

 of the portion which did not pass through the sieve to one pound, reduced to per cent., 

 gave the fineness. 



Table I gives the percentage of each cement which did not pass through cement 

 sieve No. 50. 



TABLE I. 



The specimens used in the tensile tests were of the standard size and shape. 

 Their smallest section has an area of one square inch. 



Table II gives the name, age, number of specimens of each kind broken, and 

 the breaking load of neat cement. 



TABLE IL 



