Hawortu. | Lead and Zinc. 35 
( Sheet lead. 
Metallic.... . Lead piping. 
| Shot and bullets. 
( Ryne metal. 
Babbitt metal. 
Alloys...... | White metal. 
| Fusible alloys. 
f , White lead. 
| Red lead. 
JETRO 6 000 00 | Chrome yellow. 
| | Orange chrome. 
_Turner’s yellow. 
USES OF LEAD - 
; Cut glass. 
Cathedral glass. 
_ Artificial gems. 
Sugar of lead (lead 
acetate). 
Medicinal....... / Lead nitrate, lead 
iodide, lead stea- 
| 
| 
| 
| Flint glass. 
| 
| rate, lead oleate. 
present in lead pipes, large quantities of which are used in 
plumbing and in telephone cables. Sheet lead is used for 
lining sulphuric acid chambers, iron tank cars for shipping 
sulphuric acid, and many kinds of boxes for packing various 
goods whenever moisture is to be shut in or out, or delicate 
aromas preserved, as in packing teas, cigars, etc. It is then 
usually spoken of as ‘‘tin-foil,’’ but for its manufacture an 
unusually pure lead is required, as impurities generally make 
the lead harder and more or less malleable. 
Lead is used to some extent in almost all kinds of glass, 
but particularly in the kinds named above. It is usually 
added in the form of litharge, or yellow oxide. Its use in 
medicine is not great, but on the whole is quite important. 
NATURAL COMPOUNDS OR MINERALS OF LEAD. 
Native Leap.—*‘‘Native lead is very rare, generally in 
thin plates or scales; found in dolomitic limestone at iron 
and manganese mines in Wermland, Sweden. At the Harstig 
mines isometric crystals occur, with a small per cent. of silver 
(less than 0.38). Hartman regards the metal to have been 
reduced by arsenious acid. It has been recognized in meteor- 
ites.” It is also found in gold washings of the Urals, doubt- 
*Winslow, Arthur: Mo. Geol. Surv., VI, p. 18. 
19. Parmentier, P. Plumb et ses Composes, p. 140, Paris, 1892. Encyclopedie Chiminique, 
publice sous le direction de M. Fremy. 
