Sentence:  If it is assumed that the formula given by Lodge of * * f , cosec 2lc applies , the pressure difference along the major axes can be calculated from the angle of inclination of the <WSD>major</WSD> axis , and from this the interfacial tension can be calculated . 
Meaning of the word marked with <WSD> tags:  the longest axis of an ellipse or ellipsoid; passes through the two foci