SOLDERS AND CEMENTS. 4:73 



SOIDEKS. 



For lead solder. Melt 1 part block tin,, and when fused, 

 add 2 parts of lead. Use resin with it. 



For tm solder. Melt 4 parts of pewter, 1 part of tin, 

 and 1 part bismuth together. Use resin with it. 



CEMENTS. 



Grime. Melt 1 Ib. glue in 2 quarts warm water. For a 

 glue that will resist the action of water, boil 1 Ib. of glue 

 in 2 quarts of skimmed milk. Pulverized chalk added to 

 glue strengthens it. 



Soft cement. For boilers, steam-pipes, &c. : 4 parts red 

 or white lead, ground in oil, with 2 or 3 parts iron filings. 



Hard cement. Mix iron borings or filings with salt 

 water, then add a small quantity of sal ammoniac with 

 water. 



Hydraulic cement for cisterns, sewers, cellars, pipes, 

 &c., is purchased by the barrel, which contains 300 Ibs. 



Dry cementr which will resist the weather equal to 

 marble, is made of 2 parts sifted ashes, 3 parts clay, and 1 

 part sand, mixed with oil. and applied while soft. 



Brown mortar,, for masonry, brick-work, <&c. 

 Mix 1 part lime, 2 parts sand, a small quantity of hair 

 with water. 



