Proceedings of the 4th Technical Sessions - March 1988

Transformation of 'Geuda' Stones to Blue Sapphires by Heat Treatment
R. N. Ediriweera and S. I. Perera
abstract

DC Operated Fluorescent Lamp Circuits
H.P.N.J. Gunasekara and R.A.S. Dewapriya
abstract

Polar Conductivity Profiles of the Lower Atmosphere Under Fair-weather Conditions
K.P.S.C. Jayaratne, H.G.S. Siriwardana, D.L.N. Jayathilaka, F.L. Karunarathne and S.V.K. Manchanayake
abstract

The Effect of distorted Atmospheric Electric Field Lines on the Measurement of Small Ion Densities
K.P.S.C. Jayaratne, E. Knudsen, H.G.S. Siriwardane, D.L.N. Jayathilaka, S.V.K. Manchanayake and F.L. Karunaratne
abstract