378 



FARM DEVELOPMENT 



Figure 268. 



parts sand and five 

 parts gravel or stone. 

 The cement and other 

 materials can be 

 measured by means 

 of bottomless boxes 

 set in the mortar box. 

 The cement and sand 

 should be thoroughly 

 mixed dry; a "crater" 

 should be made in the 

 pile, the water poured 

 in, the edges of the 

 crater worked into the 

 water and then the 

 whole worked and 

 shoveled over until 



thoroughly mixed. The mortar can then be spread out 

 level and the gravel or crushed stone can be spread on 

 evenly and the whole 

 well mixed by shoveling 

 over until uniform. 

 Using a "dry mi x," 

 which "must be tamped 

 for some time before 

 water shows on the sur- 

 face," is not so satisfac- 

 tory as a " moist mix " 

 which " requires only a 



little tamping to bring 



moisture to its surface," 



or a " wet mix," which 



" can be poured " and " only needs to be worked about till 



it fills all crevasses." The reinforcing wires are retained 



in position with some difficulty if a too dry mix is used, 



and are liable to be forced so close to the corners that 



Figure 269. 



