TABLE OF CONTENTS. 



Paut I. 



INTKODUCTOIIY. 



Page. 



A. Historical and geueral 285 



B. The minerals of building stones 293 



C. Physical and chemical properties of rocks .,,,,.. 302 



(1) Dousity and hardness ,. 303 



(2) Structure , 302 



(3) State of aj^gregatiim , , 305 



(4) Eift and grain 306 



(5) Color 306 



(6) Chemical characters 307 



D. Eock classification. (Table) 308 



E. Geological record. (Table) 309 



F. Methods of quarrying and dressing 310 



(1) Joints in rocks and their utility iu quarrying 310 



(2) Granite quarrying 311 



(3) Marble quarrying 311 



(4) Sandstone quarrying 312 



(5) Cutting and dressing 313 



(0) Quarrying and splitting slate 318 



(7) Kinds of finish " 319 



G. Machines and implements used i u stone working 32u 



(1) Drills and drilling machines 320 



(2) Channeling machines 321 



(3) Gadding and gadding machines 324 



(4) Grinding and polishing machines 326 



(5) Lathes and planers 327 



(G) Saws 327 



(7) Sand-blast carving 329 



(8) Hand implements 329 



H. The weathering of building stones 3.31 



(1) Physical agencies iiromoting disintegration 331 



(2) Chemical agencies promoting disintegration 336 



(3) Induration of stone on exposure 339 



(4) Weathering properties of stones of various kinds 340 



I. On the selection of building stone 34.'"> 



(1) General considerations 34.^ 



(2) Precautions to bo observed 347 



(3) Comparative durability of stones of various kinds 349 



K. Methods of protection and preservation 352 



(1) Precautionary methods 352 



(2) Protection by meaua of eolutions ,, 354 



879 



