XII LIST OF ILLUSTRATIONS. 



Facing page. 



18. Leda clays, Lewiston, Maine. From a photograph by L. H. Merrill 333 



19. View in a kaolin pit, Delaware County, Pennsylvania 339 



20. Map showing phosphate regions of Florida. After G. H. Eldridge 366 



21. Borax mine near Daggett, California. Interior and exterior views 398 



22. View of a gypsum quarry. From a photograph by the Iowa Geological 



Survey "^08 



23. Peat beds overlying gold-bearing gravels, Mias, Russia. From a photo- 



graph by A. M. Miller 424 



24. Map showing the developed coal fields of the United States. From the 



Report of the Eleventh Census 426 



25. Map showing areas where bitumen occurs in the United States and 



Canada. From the Report of the Tenth Census 429 



26. Plan of Pitch Lake, Trinidad. After S. F. Peckham 442 



27. Nodule of gum copal from Congo River region, Africa. Specimen No. 



62717, U.S.N.M 457 



28. Microsection of mica schist used in making whetstone. Fig. 1, cut across 



foliation. Fig. 2, cut parallel to foliation 467 



29. View of novaculite quarry, Arkansas. After Griswold, Annual Report of 



the Geological Survey of Arkansas, III, 1890 468 



30. Microsections showing the appearance of (1) Arkansas novaculite and (2) 



Ratisbon razor hone. The dark bodies in (2) are garnets 470 



A Primitive Frame for "Weaving Narrow Fabrics. 

 By Otis Tufton Mason. 



1. Zuni woman weaving ceremonial belt 510 



2. Patterns of garters and belts made in heddle frames in Helsingfors 510 



3. Loom with heddle frame for weaving silk braid ' 510 



4. Patent heddle frame No. 334320 510 



5. Belt and garter patterns from Pueblos 510 



6. Construction of Pueblo heddle frame 510 



7. Types of Pueblo heddle frames 510 



8. Types of Pueblo heddle frames 510 



9. Pueblo batten knives for beating home the weft 510 



An Early We.st Virginia Pottery. 



By Walter Hougu. 



1. Ware of the first period 522 



2. Ware of the first period 522 



3. Ware of the first period 522 



4. Ware of the first period 522 



5. Ware of the first period 522 



6. Ware of the second period 522 



7. Ware of the second period 522 



8. Tools of the potter 522 



9. Tools of the potter 522 



10. Tools of the potter 522 



11. Handle dies of the potter 522 



12. Bottles for slip painting 522 



