. The London, Edinburgh and Dublin philosophical magazine and journal of science. Ussher (W. A. E.) on the triassicstrata of the South-western coun-ties, 68; on the triassic rocks ofNormandy, 152. Vapours, on the friction of, 157. Voltaic action, on the theory of,142. Voltameter, on the sonorous, 468. AVanklyn (Prof. J. A.) on the actionof permanganate of potash on cer-tain gases, 288. Water, on salt-solutions and attached,35, 105; on the discharge of, fromorifices at different temperatures,281. Watsons intra-Mercurial planet, noteon, 320. Wichmann (Dr. A.) on the micro-scopical investigation


. The London, Edinburgh and Dublin philosophical magazine and journal of science. Ussher (W. A. E.) on the triassicstrata of the South-western coun-ties, 68; on the triassic rocks ofNormandy, 152. Vapours, on the friction of, 157. Voltaic action, on the theory of,142. Voltameter, on the sonorous, 468. AVanklyn (Prof. J. A.) on the actionof permanganate of potash on cer-tain gases, 288. Water, on salt-solutions and attached,35, 105; on the discharge of, fromorifices at different temperatures,281. Watsons intra-Mercurial planet, noteon, 320. Wichmann (Dr. A.) on the micro-scopical investigation of some Hu-ronian clay-slates, 311. Worthington (A. M.) on the bluecolour of the sky, 267. Zinc, on the analysis of alloys con-taining, 14. Zoppritz (Dr. K.) on the theory ofocean currents, 192. END OF THE SIXTH VOLUME. Printed by Taylor and Francis, Red Lion Court, Fleet Street. co hz 0Q. < Q o z 17 !f ^COOJ r-i I1 111 ! 11111* M 11 iUL 111 ~Lc *-rw -^CQNr-i (01 oj I CO- — I----«I »-H -SH-O] -4-eo -^.fOOir cn nj B. del Mmter-n Bros o ox Fi 4. 4-. Fig. 5. 6T-crc 75°6Megohm*. lT15°6Megohms TempercuULne 100C


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