The book The Age of the Earth And Other Geological Studies was written by author W J William Johnson Sollas Here you can read free online of The Age of the Earth And Other Geological Studies book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Age of the Earth And Other Geological Studies a good or bad book?
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In April, 43 cubic centimetres, and in August, 509 cubic centimetres of planctone were observed in 40 cubic metres of water. fresh waters approach most nearly to those of the sea, and with them their populousness. " * The effect of a temperate climate is well illustrated * " On the Occurrence of Marine Animal Forms in Fresh Water, " by E. Von Martens, Ann. And Mag. Nat. Hist. , 1858, vol. I. P. 50. GROWTH OF PLANCTONE 175 by the observations made of late years on the variation from month to mon...th in the volume of the living forms, animals and plants, which constitute the floating or swimming world (planctone) of lakes and rivers. An estimated quantity of water is allowed to pass through a muslin net with meshes fine enough to arrest the living creatures, the volume of the capture is then measured. The diagram on p. 174 illustrates by means of curves the change in volume of the planctone with the season of the year as observed in the case of the Ploen * and the Dobersdorf lakes in Holstein.