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  "text": "XXXIX. *The Lignites and Clays of Bovey Tracey, Devonshire.* By William Pengelly, F.G.S. Communicated by Sir Charles Lyell, F.R.S.\n\nXL. *On the Fossil Flora of Bovey Tracey.* By Dr. Oswald Heer, Professor of Botany, and Director of the Botanical Gardens in Zurich. Communicated by Sir C. Lyell\n\nXLI. *On the Anatomy and Physiology of the Spongiadæ.*—Part III. *On the Generic Characters, the Specific Characters, and on the Method of Examination.* By J. S. Bowerbank, LL.D., F.R.S., F.L.S. &c.\n\nIndex\n\nAppendix.\n\nErrata.\n\nPage 163, lines 2, 9, 13 (art. XLVII.), erase the word “non-polar.”\n\n—— line 7, *for* because *read* when.\n\n—— 588, line 10 from bottom, cancel $p$ at the end of the formula, which should be\n\n$$\\frac{Ct}{\\nu} = \\frac{3}{4} AJK \\frac{(273 \\cdot 7)^2}{t}.$$  \n\n—— 755, 7 lines from bottom, *for* Plate A. *read* Plate XXVII.\n\n—— 864, 8 lines from bottom of text, *for* fig. 2 *read* fig. 2.\n\n—— — 6 lines from bottom of text, *for* fig. 3 *read* fig. 2.\n\nPage 869, 13 lines from bottom of text, *for more* *read* less.",
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