( )



:

?


' (1851-1940)

- "\' (1851-1940)"

' (D'Arsonval) (1851-1940), . , (1891) ().


:
""
" (1894-1988)" - ...
""
""
" (346-399)"
""
" (3-4 .)" - ...
""
"" - ...
""
""