 | Gill's scientific, technological and microscopic repository - 1827 - 448 pages
...about eight parts of water, add one part of shell, or seed-lac, and heat the whole to ebullition. Wh<^n the lac is dissolved, cool the solution, and impregnate it with chlorine, till the lac is all precipitated. The precipitate is white, but its colour deepens by •washing and... | |
 | Luke Herbert - 1828 - 394 pages
...an iron kettle, one part of pearlash in about eight parts of water ; add one part of seed or shell lac, and heat the whole to ebullition. When the lac...cool the solution, and impregnate it with chlorine, till the lac is all precipitated. The precipitate is white, but its colour deepens by washing and consolidation... | |
 | 1832 - 636 pages
...of bleaching shell, or teed lac. By R. VOL. XVIII. PART I. HARE, MD — Dissolve, in an iron kettle, one part of pearlash in about eight parts of water,...cool the solution, and impregnate it with chlorine till the lac is all precipitated. The precipitate is white, but its colour deepens by washing and consolidation;... | |
 | Luke Hebert - 1835 - 938 pages
...iron kettle, one part of pearl-ash in about eight parts of water ; add one part of seed or shell-lac, and heat the whole to ebullition ; when the lac is...cool the solution, and impregnate it with chlorine till the lac is all precipitated. The precipitate is white, but its colour is deepened by washing and... | |
 | Daniel H. Whitney - 1835 - 614 pages
...pearlash in about eight parts of water, add one part of shell or seed lac, and Iieat the whole to boiling. When the lac is dissolved, cool the solution and impregnate it with chlorine, till the lac is all precipitated. 256. To clean black veils. Pass them through a liquor of bullock's... | |
 | Luke Hebert - 1836 - 942 pages
...iron kettle, one part of pearl-ash in about eight parts of water ; add one part of seed or shell-lac, and heat the whole to ebullition ; when the lac is...cool the solution, and impregnate it with chlorine till the lac is all precipitated. The precipitate is white, but its colour is deepened by washing and... | |
 | Theodore Henry Fielding - 1847 - 250 pages
...Dissolve in an iron kettle one part of pearl ash, in about eight parts of water ; add one part of shell lac and heat the whole to ebullition. When the lac...cool the solution and impregnate it with chlorine till the lac is all precipitated. The precipitate is white, but its colour deepens by washing and consolidation... | |
 | 458 pages
...pearlash in about eight parts of water; add one part of shell-lac, and heat the whole to ebullijtion. When the lac is dissolved, cool the 'solution, and impregnate it with chlorine until the lac is all precipitated. The precipitate is white, but its colour deepens by washing and... | |
 | William Kirby Sullivan - 1854 - 616 pages
...Dissolve in an iron kettle 1 part of pearl-ash in about 8 ports of water, add 1 part of shell or seed-lac, and heat the whole to ebullition, when the lac is...dissolved, cool the solution and impregnate it with chloric gas until the lac is all precipitated. The precipitate is white, but the colour deepens by... | |
 | William Kirby Sullivan - 1854 - 820 pages
...Dissolve in an iron kettle 1 part of pearl-ash in about 8 parts of water, add 1 part of shell or seed-lac, and heat the whole to ebullition, when the lac is...dissolved, cool the solution and impregnate it with chloric gas until the lac is all precipitated. The precipitate is white, but the colour deepens by... | |
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... and heat the whole to ebullition. When the lac is dissolved, cool the solution, and impregnate it with chlorine, till the lac is all precipitated. The precipitate is white, but its colour deepens by washing and consolidation ; dissolved in alcohol,... 
