Bulletin of the of Agriculture . •Y I I mm UNITED STATES DEPARTMENT OF AGRICULTUREBULLETIN No. 620 Contribution from the Forest ServiceHENRY S. GRAVES, Forester Washington, D. C. PROFESSIONAL PAPER March 14,1918 EFFECT OF VARYING CERTAIN COOKING CONDITIONS IN THE PRODUCTION OF SULPHITE PULP FROM SPRUCE By S. E. LUNAK, Chemist in Forest Products CONTENTS Purpose of the Experiments . . The Sulphite Process Kinds of Wood Used Present Methods of Operation . Plan of Tests Apparatus Method of Conducting Experiments PageEffect of Varying the Ratio of Free toCombined SO, or the Amount of
Bulletin of the of Agriculture . •Y I I mm UNITED STATES DEPARTMENT OF AGRICULTUREBULLETIN No. 620 Contribution from the Forest ServiceHENRY S. GRAVES, Forester Washington, D. C. PROFESSIONAL PAPER March 14,1918 EFFECT OF VARYING CERTAIN COOKING CONDITIONS IN THE PRODUCTION OF SULPHITE PULP FROM SPRUCE By S. E. LUNAK, Chemist in Forest Products CONTENTS Purpose of the Experiments . . The Sulphite Process Kinds of Wood Used Present Methods of Operation . Plan of Tests Apparatus Method of Conducting Experiments PageEffect of Varying the Ratio of Free toCombined SO, or the Amount of Lime in the Cooking Liquor 14 Effect of Varying Total Sulphur Dioxide . 18Effect of Varying the Temperature of Cooking 19 Summary of Results 21 Methods of Analysis and Otner Tests . 22 Analysis of Cooking Liquor ..... 22
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
