xviii CONTENTS 



B. LICHENS AS MEDICINE ...... 405 



a. Ancient remedies 



b. Doctrine of "signatures" 



c. Cure for hydrophobia 



d. Popular remedies 



C. LICHENS AS POISONS .< ' . . 410 



D. LICHENS USED IN TANNING, BREWING AND DISTIL- 

 LING B . . . .411 



E. DYEING PROPERTIES OF LICHENS . . ... 411 



a. Lichens as dye-plants 



b. The orchil lichen, Roccella 



c. Purple dyes: orchil, cudbear and litmus 



d. Other orchil lichens 



e. Preparation of orchil 



f. Brown and yellow dyes 



g. Collecting of dye-lichens 



//. Lichen colours and spectrum characters 



F. LICHENS IN PERFUMERY 418 



a. Lichens as perfumes 



b. Lichens as hair-powder 



G. SOME MINOR USES OF LICHENS . . . . 420 



APPENDIX . ...... 421 



ADDENDUM . , 422 



BIBLIOGRAPHY ... .... 423 



INDEX ... . . ... 448 



