THE Fifth Pacific Science Congress of the Pacific Science Association was held in Canada in 1933 under the presidency of Dr. H. M. Tory, president of the National Research Council of Canada. The Congress, which was held under the auspices of the National Research Council of Canada and through the generosity of the Government of Canada, was a notable achievement in the history of the Association. Representatives of no less than thirty-two countries attended the Congress, while the total number taking part in the meetings exceeded four hundred. The meetings were held in Victoria, B.C., on June 1-4 and in Vancouver, B.C., on June 5-14. The success of the Congress has now been crowned by the publication of the Proceedings in five large volumes amounting to more than four thousand pages (Toronto: University of Toronto Press; London: Oxford University Press, 1934. 5 vols. 84s. net). These volumes form a noteworthy summary of scientific knowledge from many aspects contributed by research workers of those countries bordering the Pacific Ocean. It is clearly not possible to review the contents of these volumes, but mention should be made of the lavish hospitality extended to the members and participants by the Canadian authorities. The many social functions and the interesting excursions arranged for the entertainment of the visitors must have largely fulfilled one of the main objects of the Pacific Science Association, which is “to strengthen the bonds of peace among Pacific peoples by promoting a feeling of brotherhood among the scientists of all the Pacific countries”. This alone should be sufficient tribute to the devoted care and energy given by those responsible for the organisation of the Congress.