“…Thus, it would appear th a t all major serum protein fractions may be present in the CSF [17,18,22,26,28], and th a t abnorm al scrum protein concentrations may produce -although to a lesser and inconstant degree -abnorm al CSF protein findings [4,14,17,18,20,22], The CSF protein content, however, is distinct from th a t of serum, as protein fractions, which are found only in the CSF, have been reported [11,12,15,17,19,21,26,28]. Furtherm ore, there is some evidence th a t certain proteins can be produced by the central nervous system and its coverings [14,16,20,22,26,28,29].…”