( )



:

?


- ""

, Sn, Pb, . . (I. Babbitt; 1799-1862).


:
""
" (. 798 800-838)" - ...
" (1894-1940)" - ...
""
" (1919-87)"
" (. 1946)" - ...
""
""
"" - ...
""
" (1854-1926)" - ...