Mchohson* . PhUot. Journal, Vol.JXVlPl. 5,/y.JJJ. 



QsW J^Mitrj fatctfammfa 



Ffy.2. 



\JfcfM<&4> <&#%a4t 



Fia6 



Fuj.5. 



£%^0(&*!M* ^&y/ tfd#£*fy? 



