b i li Li ie Us tt i i! ik fl i se itil 0 Hi Hy Hi " re Mt ae i il sult i ist Wy i by it | a aa 3832 it ae i i ul i il, ae ; E ys) a it Yours very truly, (Signed) Fe Ae RUSSELL Professor of Civil Engineeringe Sa eee sermuige aw ae 5 dud aa ap ee Pd SAND cial a