I am afraid that my closing address cannot possibly follow on the traditional lines, that is to say review the work of the seminar, sum up its conclusions and the consensus of opinion and end with the proverbial “the success of this conference can only be gauged after the necessary tabulation and careful consideration of the views expressed”. With the exception of the very last part of the phrase which I hereby endorse and repeat, I shall prove to be unconventional in so far as the summing-up part is concerned because due to pressure of work I could not attend the conference, follow its proceedings and start preparing my closing address.