Taking a general view of the subject, we see that an investigation, as complete as possibly, of the geology of the Polar countries, so difficult of access, is a condition indispensable to a knowledge of the former history of our globe. In order to prove this I need only point to the epoch-making influence which has been exerted on geological theories by the discovery, in the rocks and earthy layers of the Polar countries, of beautiful fossil plants from widely separated geological periods. In this field too our expedition to the north coast of Siberia ought to expect to reap abundant harvests. There are besides to be found in Siberia, strata which have been deposited almost contemporaneously with the coal-bearing formations of South Sweden, and which therefore contain animal and vegetable petrifications which just now are of very special interest for geological science in our own country, with reference to the discoveries of splendid fossil plants which of late years have been made at several places among us, and give us so lively an idea of the sub-tropical vegetation which in former times covered the Scandinavian peninsula. Few sciences perhaps will yield so important practical results as meteorology is likely to do at some future date--a fact, or rather an already partly realised expectation, which has won general recognition, as is shown by the large sums which in all civilised countries have been set apart for establishing meteorological offices and for encouraging meteorological research. But the state of the weather in a country is so dependent on the temperature, wind, pressure of the air, etc., in very remote regions that the laws of the meteorology of a country can only be ascertained by comparing observations from the most distant regions. Several international meteorological enterprises have already been started, and we may almost consider the meteorological institutions of the different countries as separate departments of one and the same office, distributed over the whole world, through whose harmonious co-operation the object in view shall one day be reached. But, beyond the places for which daily series of observations may be obtained, there are regions hundreds of square miles in extent from which no observations, or only scattered ones, are yet to be had, and here notwithstanding we have just the key to many meteorological phenomena, otherwise difficult of explanation, within the civilised countries of Europe. Such a meteorological territory, unknown, but of the greatest importance, is formed by the Polar Sea lying to the north of Siberia, and the land and islands there situated. It is of great importance for the meteorology of Europe and of Sweden to obtain trustworthy accounts of the distribution of the land, of the state of the ice, the pressure of the air, and the temperature in that in these respects little-known part of the globe, and the Swedish expedition will here have a subject for investigation of