. Johnson's new universal cyclopaedia : a scientific and popular treasury of useful knowledge. en tempered stitUy with water,and formed into lumps of irregular shape of from li to 6pounds weight. These, after jiartial drying, are burnt inthe kiln in layers, alternating with layers of anthracite coal,about sixteen days beingconsumed in ;i, coolhltf^ anddi-nwiii;i a Kiliif.—iMatorial.* such as common lime, lloman cement, and tlio argillo- maguesian cements of the U. S., that do not, like Portland cement. require prolonged in- tonso heat, ean be bur
. Johnson's new universal cyclopaedia : a scientific and popular treasury of useful knowledge. en tempered stitUy with water,and formed into lumps of irregular shape of from li to 6pounds weight. These, after jiartial drying, are burnt inthe kiln in layers, alternating with layers of anthracite coal,about sixteen days beingconsumed in ;i, coolhltf^ anddi-nwiii;i a Kiliif.—iMatorial.* such as common lime, lloman cement, and tlio argillo- maguesian cements of the U. S., that do not, like Portland cement. require prolonged in- tonso heat, ean be burnt in upright kilns (either bell-shaped, eyliildrieal, or ovoidal) without in-termission in the fires. The kiln is filled with al-ternate layers of coke or coal and the stone to burned, and then fired from below with light wood. As the eombus tion is completed in the lower portion, Iho burnt stone is drawn out from time to time, allowing tho entire mass above to settle down. New layers of fuel and stone are then added at top. The layers of stone should not exceed six inches in thick-. SCALE or rcET.
Size: 1280px × 1951px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, bookidjohnsonsnewu, bookyear1881
