THREE POLAR EXPEDITIONS. They Are llased cm DlBtrcat Theories and Will Take Different Itootes. Three expeditions, baaed upon different differ-ent theories a to tho bat way to reach the north polo. i"t pursuing different routes, are to set out for that destination this aummcr. Dr. NaMsen Is to sail along tho coast of Siberia until he reaches a point off tho mouth of the r,cna delta, near whero tho Jeunnetie w aa lost J and then go north till locked In tho Ico field, which he e.tpects will float with hlht acrosi the. pole. Nan-sen's Nan-sen's ship la nearly ready, his stores and provisions aro being prepared and his crew selected. Ills Intended associates associ-ates tn tho expedition among whom may bo Mro. Nansn are ulrcady testing test-ing their endurance by sleeping in Nor wofrian snow-drifts, and a depot of supplies U being prepared far up on the 'Ulierlnn const. It 1 hero that some-limn some-limn next Juno Nanson will tako en lioard his dogs and dedgesj for his ex-fioditiou ex-fioditiou Is in be well equipped for Journeying over land or over tho Ice, Hhould it bocorae necessary to leavo his ihlp. Knnscn has Incidentally contributed con-tributed to tho equipment of tho other expeditious. Ills researches, and those of tho ipeclalUta who have been employed em-ployed In his Interests, havo resulted In scvri-.tl new methods of preparing food so ns to obtain tho most nutriment In tlio least bulk, and all future explorers will profit by this work. Nansen gooa prepared to be gono six years but hopes to bo floated across tho pol0 onJ 'nto wtler off Greenland within three years. I'ho other expeditions nro both to bo Hltempts to reach tho polo or near unto Uovorland. Lieut. I'oary's plans are fumlllnr, but not so thosu of rroderlck Jiiclccon, who la organizing an expedition expedi-tion which U to sail from Liverpool In June. Jnckson sails nt oner, for Trans Josef land, v.hUh lloa (t" l!3 north of N" .va "etr.bl.i and to tho rest cf Spitz-ucrgi'ii. Spitz-ucrgi'ii. It -.-mlhornmoat point louihei. tho eli;ht!c1li parallel of notth latitude, fid tho hlxtlolh parallel of east longi-:.r' longi-:.r' bisects it, Jlow far It ijituIs nm lluvnrd n ono knows. Wcyprccht and l'aycr distovtrod It u Augitst, IST.'l, and went sonio distance Into tho in-tevlor. in-tevlor. lVtcrmim' land und ()i.(.nr land Ho to tho north. Id latlt'ido bl and beyond, and incasiirn tho limit of exploration ex-ploration In this part of tho Arctic regions. re-gions. Jackson thinks that Peary haa gono north ns far as pohslblo on Orccn-land, Orccn-land, and that ho will ouly cover tho old ground in his coming attempt to go farther. As to Nanson, Jackson Is confident con-fident that his ship will meet tho Into of ths Jeanuotto and tho Tegothof, by being crushed in tho thick lco. Ills own thoory Is that Potorman's land extends ex-tends as far north e latitude 63, at leust. This would bo within 800 miles of tho polej a distance which ho proposes pro-poses to coyer In boats If ho find an pen sea, or on sludges It ho find land r i.'B. Jackson's party will consist of ..nor twelve, and bo provisioned for threo years. , -.