16 THE PRESIDENTIAL ADDRESS. Another event of good omen for the future has been the preliminary steps that have been taken to establish closer relations between the learned societies in East Anglia interested in like studies to our own. The need for united work in all scientific research and the evils of isolation in study are increasingly evident, and we heartily welcome this prospect of union with valued fellow-workers. I will not venture to attempt a review of the general progress of science in the branches in which we are chiefly interested. It is more and more difficult to keep abreast with progress, even of one branch of knowledge, and yet at the same time the interdependence of the various branches of study becomes more and more fascinating, yet bewildering. It is not only difficult but impossible to define spheres of influence among the sciences either in their abstract study or in their practical applications. Perhaps in nothing is this interpenetration more marked than in the striking manner in which the phenomena of life, and still more of the interdependence of the higher and lower forms of life, complicate so many problems of modern scientific thought. In Chemistry, for example, the marvellous progress in the synthesis of organic compounds had seemed almost to do away with any distinction between the organic and the inorganic, but though these distinctions may seem obliterated as to the resultant compounds, our results are obtained by processes that throw little or no light on the natural life problem. We can synthesize alcohol from olefiant gas, and we can, by oxidation with spongy platinum, change this into acetic acid. In this we but clumsily imitate the processes which, under the influence of the living plant, synthesize starch from the gases of the air ; then, by the inimitable action of germination, transform it into sugar ; and then, by the obscure intervention of a foreign micro-organism, split it up (how we know not as yet) into alcohol and carbonic acid, ready for yet another organism to transform (for unknown reasons of its own) into acetic acid. Again, our conception of organic chemistry has been revolutionised by the discovery firstly of the influence of the nitrifying micro-organisms in transforming and modifying the combined nitrogen of the soil, and still more of the semiparasitic organisms to which apparently the supply of combined nitrogen for higher plant life is largely due. It is impossible to over- estimate the importance of this and of other cases of symbiosis.