Some explanation is due to the members of the Association for the delay in the publication of the Journal, which in the ordinary course would have appeared in November, 1893. It is proposed for the future to issue the half-yearly parts in July and January, and accordingly the publication of the present number was deferred from November of last year to January, 1894. Unforeseen circumstances affecting myself have caused a further postponement, but the customary punctuality in the appearance of the Journal will be observed in the future.