Mr. H. J. Buchanan-Wollaston had on exhibit a series of slides of herring scales, and contended that it was incorrect to assume, as had been done that the age of the fish could) be computed by numbering the rings, as is done in the case of the tree. He has found a celluloid device that he intends to fix on captured herrings before liberating them, in the hope of learning more about the. life-history of the fish. Rothamsted was responsible for a complicated electrical apparatus for testing the nature of soil. A bad tilth can be compared to a team of football players in the formation in which they enter the ground, while a good tilth is like the forwards of the same team in scrum formation, and an automatic apparatus has been devised to show exactly hew far given soil approaches to or deviates from the ideal. The National Institute for Medical Research had a series of beautiful microscopic slides illustrating the advantages to be derived from using polarised light for ordinary
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