An Account of the Recent Arctic Discoveries by Messrs. Dease and T. Simpson

Peter W. Dease, Thomas Simpson
1838 Journal of the Royal Geographical Society of London  
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more » ... ntent at http://about.jstor.org/participate--jstor/individuals/early-journal--content. JSTOR is a digital library of academic journals, books, and primary source objects. JSTOR helps people discover, use, and build upon a wide range of content through a powerful research and teaching platform, and preserves this content for future generations. JSTOR is part of ITHAKA, a not--for--profit organization that also includes Ithaka S+R and Portico. For more information about JSTOR, please contact support@jstor.org. P10f. BARR On fAe FJo.zen Soil of Sibe-ricz. P10f. BARR On fAe FJo.zen Soil of Sibe-ricz. 013 013 lower than that which Mr. Scoresby assigns to the north of Spitzber^,en, might well surprise me until I had ?een it perfectly established l)y observations on the temperature of the air which were made during several corlsecutive years, and with thermometers compared with my own. " I enclose the observatiolils taken three times a da for the year 1827. whence it results that tlle metm temlhelature of the atmosphere at Ya kutsk is 5?. 9 Reaumur, wlilich agTees very well with the temperattlie which I had found near the surface of the grounel. " I may remark that I haxre selected a teZnTpe7 cTte uninters for in 1828 the cold in the mollth of January nvas mllch more severe, as the mean of the observation thell gave .Nt6 A,bI. 2 r.M. 9 P.M. J-anuary, 1838 38?.3 -3,ro,7 370 and the mercury did lwot theaw for t1t?ee months together: in ordinary years it is only soliel for tvo months. " Now the mean telulgeratul e of Yukutsk lJeillg 6?, it follows necessarily tllat if we tlit cleeI:)el ilitO tlle tarth we must llOt expect to find the ground thawed till tlile illcrernent of heat (lue to the approacl towards tlle centre should amoullt to 69 of Reauinur. " The clatct +shich we hitllerto possessed on the illerease of the interrlal heat of the globe, alld which have been collected together by Mr. Delabeche in llis excellellt treatise on Geognosy, indicated from 90 to 100 French iet for all iIlcrease of 1? of Reavlmur; I did not therefore expect to find the grourl(l thawed at Yaktltsk until at a depth of from 5()0 to 600 French feet (see p. 251 of vl)l. ii.), and if the actual iact of a thaxY at tlle depth of 400 feet has sull)rised me, it is only because it lwas occurred too soon; and that it tllereby illdicates for the strata that compose tlle groull(l at Yakutsk a greater faculty for conducting heat than is llossessetl ly the strata hitherto examined in Europe." XVII.-24n Accotcat of the Recest Arctic Discoveries by Messrs. DEASE an(l T. SIMPSON. Cosumunicate(l I)v J. H. PELLY, Esq., Governor of the Hutlson's Bay Company. [Just half a century has elapsed since Alexancler Afackenzie, in 1789, first clescencled the great river which so justly bears his name} and reached the watcrs of the Polar Sea. Thirty-seven years later in 1826, Franklin and Baclc foll()sved Mackenzie's course to the mouth of the same rivcr, ancl c()asted 370 miles to tlle westward, tracing the noothern shoze of America till xvithin 16() miles of Point Barrw, which was reache(l from the westwar(l by Mr. Elsoll, Master of H.M.S. Blossom, only four daf s after Frallklin was oljlige(l to rettlrn. The intermediate portion has remained a.l)lallk Oll our maps till the last few days hane brought us the gratifyirlg intelligellce of an exl)edition hea(lecl by Nfessrs. Dease and Sinlpson, two enterprising officers ill the Huclsoll's Bay Company's service, havillg successfully traced the unexplored country between Point Barrow ancl Franklin's farthest; alld thus a continuous line of 60 degrees in cxtellt, of the northerl coast of America, from Point
doi:10.2307/1797798 fatcat:fgkctsi2a5dcjjyz4nkr5b6xcy