CONTENTS. 



Page 

 8. Discussion of Temperatures of the Polar Kegions in the Climato- 

 logische Beitrage. By Dove. 1857 ----- 626 

 Comparison of mean temperatures made at different places during 



the same year -___-__ 626 

 Tables of mean temperatures and of greatest cold - - - 628 



II. — Temperature of the Sea, &c. 



1. Tables of Temperature of the Sea at various depths. By Professor 

 Prestwich, F.R.S. - - - - - - -631 



2. On the Specific Gravity of Sea-water. By J. Y. Buchanan. (Proc. 

 Roy. Soc, vol. xxiii., No. 160) - - - - - 632: 



3. Researches on Sea-water and CuiTcnts. By Porchhammer - - 632 



4. The Surface temperature of Sea-water at Van Rensselaer - - 633. 



5. Determination of the Specific Gravity of Sea- water. By M. Koldewey 633 



6. The Specific Gravity of Sea-water. (McClintock) - - - 635 



III. — ^Physical Properties of Ice. 



1. On the Forms of Ice. By Dr. Kane - - . - - 635 



Remarks on Regelation of Ice ----- 636 



2. On the Formation of Floe-ice. By Sir Edward Belcher - - 637 



3. On the Composition of Sea-water and of Sea-water Ice. By Sir 

 Edward Belcher - - - - - - - 638 



4. Ice Observations. By Dr. Walker. (Journal of the Royal Dublin 

 Society. Jan. 1860) - - - - - - - 640 



5. Physical Properties of Ice. By Dr. Rae. (Proceedings of the Phy- 

 sical Society). Transposition of Boulders from below to above the 



Ice. (Dr. Rae) - - - - - - - 649 



6. Some Experiments on Sea-water Ice. By Dr. Guthrie, F.R.S. (Pro- 

 ceedings of the Physical Society) - - - - - 651 



7. Observations on Sea-water Ice. By J. Y. Buchanan, on board 

 H.M.S. *' Challenger," in the Antarctic Regions. (Proc. Roy. Soc, 



vol. xxii., No. 154) - - - - - - - 652 



8. The Temperature of Ice and Snow. By Sir John Ross. (North- 

 west Passage) - - - - - - - -652 



9. The Temperature and Thickness of Ice on the East of Greenland. 

 By M. Koldewey. (Die zweite deutsche Nordpolarfahrt, vol. ii., 



p. 565) -------- 653 



IV. — Tides and Currents. 



1. Observations at Melville Island. (Parry's First Voyage, &c.) 

 (1819-20) -------- 654 



2. Observations at Winter Island and Igloolik. (Parry's Second Voyage, 

 &c.) - - - - 655 



3. Observations at Port Bowen. (Parry's Third Voyage, &c.) - 655 



4. Observations in Wellington Channel. (Belcher) _ - - 656 



5. Tidal Observations at Port Kennedy (McClintock) - - - 659 



Discussion by Professor Haughton ----- 659 



6. Tidal Observations at Van Rensselaer. By Dr. Kane - - 660 



7. Tidal Observations at Port Foulke. By Dr. Hayes - - - 661 



8. Theory of Tides, Half-Monthly Inequality - - - - 662 



9. Observations in Polaris Bay. By Dr. Bessels - - - 663 



10. Currents on the East Coast of Greenland. By M. Koldewe y - 664 



11. Observations on Tides and Currents in East Greenland. By M. 



Koldewey -----"'" f?t 



Comparison between East and West Greenland Tides - - 665 



13 Average Depth of Baffin's Bay as deduced from the Tides - - 666 



14 Voyage of the " Polaris." Captain Markham - - " ^t? 

 15* Remarks on the Tides of the Arctic Regions - - - 671 



* An Account of the Scientific Work of the Austro-Hunganan Ex- 

 pedition. By Lieutenant Weyprecht - - - - 674 



