viu TABLE OF CONTENTS. 



PAGE 



Geologic and geographic distribution of limestones 91 



Reference list on limestones 92 



Shells as sources of lime 94 



CHAPTER VII. 



LIME-BURNING. 



Theoretical considerations 96 



The burning of a non-magnesian limestone 96 



The burning of a magnesian limestone 97 



Classification of limes 97 



Methods and costs of lime-burning 98 



Heat requiremets in lime-burning 98 



Types of lime-kilns 99 1 



Intermittent kilns 99^ 



Vertical kilns with mixed seed 101 



Vertical kilns with separate seed 103 



Ring or chamber kilns. (Hoffmann kilns.) 106 



Utilization of carbonic acid gas from lime-kilns 10& 



Costs of lime-manufacture 109 



Detailed estimates of cost 10& 



Actual costs of lime-manufacture in 1900 110 



Statistics of the lime industry 112 



CHAPTER VIII. 



COMPOSITION AND PROPERTIES OP LIME. 



General properties 115 



High-calcium vs. magnesiun limes 115- 



Composition of commercial high-calcium limes 116 



Lean or poor limes 117 



Composition of commercial magnesian limes US 



Lime-slaking 118 



Effect of impurities present 120 



Expansion of volume 120 



Effect of the presence of magnesia 120 



Method of slaking lime in ordinary practice 120 



Use of lime mortars 121 



Strength of lime mortars 122 



CHAPTER IX. 



HYDRATED LIME: ITS PREPARATION AND PROPERTIES. 



Preparation of hydrated lime 124 



Grinding the quicklime 124 



Mixing with water 125 



Sieving the product 126- 



