XVI CONTENTS. 



METHODS FOLLOWED IN THE QUANTITATIVE ANALYSIS OF BONE. 



PAGE 



Determination of the quantity of Fat in bone 285 



Determination of the total quantity of Ash in bone .... 285 



Determination of the quantity of Chlorine in the ash of bone . . 285 



Determination of the amount of Calcium in bone .... 286 



Determination of the Magnesium in bone 286 



Determination of Phosphoric acid in bone 286 



Determination of Carbonic acid in bone 287 



Determination of Fluorine in bone 288 



SECT. 5. TOOTH 289 



Dentine 289 



Enamel . . . 291 



Crusia Petrosa 293 



CHAPTER VIII. 



EPITHELIAL TISSUES OE EPITHELIUM. KEEATIN. CHITIN. PIG- 

 MENTS DEPOSITED IN THE EPITHELIAL STBUCTUEES. 



CEETAIN OTHEE ANIMAL PIGMENTS 295 



SECT. 1. EPIBLASTIC KERATIN-PRODUCING EPITHELIAL TISSUES. THE HORNY 



SUBSTANCE OF CUTICLE, NAILS, HORN, HAIR, AND FEATHERS . . 296 



Horny Substance or Keratin 297 



Inorganic Matters contained in the Horny Tissues .... 298 



SECT. 2. TISSUES WHICH YIELD CHITIN, SPONQIN, TUNICIN, AND HYALIN . 299 



Chitin 299 



Glycosamine 301 



Conchiolin 301 



Spongin 302 



Hyalin 302 



Tunicin or Animal Cellulose 302 



SECT. 3. ON CERTAIN COLOURING MATTERS OF THE EPITHELIAL TISSUES OF 



VERTEBRATES 303 



Brown and black Pigments. Melanin 303 



Pigments of the Feathers of Birds. Turacin 304 



SECT. 4. CERTAIN OTHER COLOURING MATTERS OCCURRING IN THE ANIMAL 



KINGDOM 305 



Blue Stentorin . . 307 



Actinioohrome 307 



Bonellein 307 



Carminic acid 303 



Tyrian Purple 309 



Chlorophylloid Colouring Matters 309 



