the types of transmission systems which today are available for long distance transmission of large numbers of telephone circuits are those for coaxial cables and radio links. the number of circuits is increased in both cases in step with development in technique. radio links have for several years been able to transmit 600 telephone circuits per system. and are now being designed for 960 circu...

in islamic civilization, rhetoric is the product of a great attempt to find out the secrets of quranic language; nevertheless, the achievements of such studies have been mechanically applied to persian which, compared to arabic, has a different linguistic system and literary conventions. this approach has brought about problems in defining literary terms, internal rhythm being one of them. this...