INTRODUCTORY REMARKS. 



373 



8. A few pieces of glass tubing about ten inches long, and some India-rubber 



tubing to fit the glass tubing. 



9. Three glass rods. 



FIG. 51. 



10. Three small porcelain evaporating dishes, about two inches in diameter. 



(Fig. 52, A.) 



11. Blowpipe. (Fig. 52, B.) 



12. Crucible tongs. (Fig. 52, C.) 



FIG. 52. 



13. Round and triangular file 



14. Wire gauze, about six inches square, or sand tray. 



15. One square inch of platinum foil (not too light), and six inches of 



platinum wire. 



16. Filter-paper. 



17. Pair of scissors. 



18. One or two dozen assorted corks. 



19. Sponge and towel. 



20. Two watch-glasses. 



21. Small pestle and mortar. (Fig. 52, D.) 



22. Small porcelain crucible. 



23. Small platinum crucible. (Fig. 52, E.) 



24. Wire triangle to support the crucible. (Fig. 52, F.) 



