our diagram shews us, occurs when the angles (öÝ and ö¡) are each rather under 52ô¯.
Next I have plotted, on the same diagram, and in relation to the same scales of angles, the corôÙreôÙsponôÙding lengths of the two partitions, viz. RS and MP, their lengths being expressed (on the right-hand side of the diagram) in relation to the radius of the circle (a), that is to say the side wall, OA, of our cell.
The limiting values here are (1), C , Cÿ£¢ãý , where the angle of arc is 90ô¯, and where, as we have