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Show 10 bolow t11o 'l'hrPe Fork of tho Mi ~KO IIri , wl' ·ep ~ llllllllwr of parlinlly I t 1 t . S wlJi<•h 'Lll]ll''tl' lo }c lOt'lKI'KK tl1 r Kalllt' lg iH'OIIH <:h<tr:t ·lcr. l11 .t ae H'< rangr , .. • • ' the BPlt tlw Hirrhwood Mollntai!l:>, an<l in tlt•<•d all along Lilt' <' a~ ll'rll ;.;l opu in thiH r:•gion, W(' lind l'Oiilinnal ('l'id<'IH'I' or_ llu• outpolll'lllg of I h llll ' lkd nmk•rial in the form of surf;t<'<' lwdH or 1 1!111 la,YI'I'H, l_lll·u:-;t LwLw<WIL thr r , "1' 1' · · t1·<>(•• 'l'lll'up i<TIII'OliK bt•ds thin Ollf J"ltj)I(Uy, rL~ WO l'!'r't'd!' 0' ' I I l' I'OllK •• ,.. · " 1"1 ' • from llw point ol' l'fl'uHion. ,\ lar~l' nllllliH·r _of IIH·H<' <·e.nln•s ol' 1 ~ rolrusion nmy l>c 'l'<'n along ti H· slop<' of till' n1onnla1nH w~·HI ol Lh<• .'lud1.lh ral.ll-!;<'. 'l'h l' r ruptivc 111atp1·ial Ronwlinli'H pr<'HI'III · a rPrl l<'al wall .300 f<•PL lllgh, LlH•n Httt1denly Lhins ouL a.nd disapp<'al'H. The .lndil h, lknr' ti P.aw, a1_ul r~iW e Rocky .Uounl;tiiiH Sl'l' l11 to Ill' l'Oillj)O."I'd I'm tho lli OSL parl_or grn.nlln and other rocks, wit.h igiii'OLIK protl'liKionK ll <'n' and I lll'l'l'. I !mel S11p- 1mwd, l'ron1 Llll' ob~t·rvaliom; III<Hlo in my forn H'r t•xplomtion~, that Ll:o Cl'ntral portions Of 0 111' lllOll llf<l,i ll rflllg'l'H Wl'l"l l GOIIIJlOS'd. >f fl'l<lflpatlll(' gmnilP, and to a ·ertain <·xknL l\1iK i.· 11'111' of lll<' moKL <': tsl<·rn out.li <' I'R bnt 111y I'XH!ll inationK cluring a l:tl<'l' PX]ll'dition havt' <·onv in e<•d me tl1al tl1csc roC'ks, whid1 I h:LVP elaK~!'d a: t•ruplil' <' c'O illpOHl' by f':tr the o·1· •;tler portion of' the mountain mas:;PK of' llu· wrst. ln thi:-; t·o niH'('Iion I hart• thought it lwst to pri'SI'Ill a b rh•f' an<l sy.'i<'IWttin <L<'Count ol' Lh<• prinl'ipnl riV<'I'R that drain th iK in1n1 1'nK' :m· ~L of' nouuLry. '!'he .Misso uri Wv(•r a1Hl ilK Lrilndari PS f'or lll onl' of I lw la,rgPsL :t:-1 w •11 a.H mo 'L inq>o rl;tnL lty drogmphi cal lmHins in Anwrica. 'l'IH'.)' dmill :Lil !U'l':t or n!'arly 01' q11ifo OUI' IUilliOII Hq nal'l' lllih•H. H.iHing in tho l of't irHt portion or tlw Horky Mountains, n •:.11' latit udl' 44 °, longitude 11:3°, th • Mis~wuri !lows nort hward in th l'l'l' pri1wipn.l hntll\' hPH, ~I allison, Gallatin, and J<• fl'l'I"On Fork:; to llll'ir ,iundion, ancl thPn proe<'t'<ls onward un til it em •rgrs from the g<tl<' of' th' mountain;;, a. diRtn.ne<• of IH'a rly 200 1nik ·; it tlwn bends lo tl1c l'aslw:tnl, llowing in this tli n·dion to LIH• cnt ralH'<' of \VhilP Earth Rivt•r ~l di:lancr of JH:•al'ly fiOO 111ill'S; it th •n gra.clua.lly brn<lH ouLhwarll and soutlit•a,;twanl Lo it::; jun ·lion wiLl! t.lw "Wiif:dssippi, n di:;tan ·c of 1,1300 lo 2,000 mil l's. Th bm.nelii'H which f'or111 tho Hourcl's or thP :Missouri ri se in th<· c ·nt.ml portion:-; or l hc Roeky Mountrti ll mngc, llowing throun-h graniti e, ba~:~ttltic:, n.ntl the >ltlcr f31'<1inH'Illary I' cl·:-; until iL em •rgc ' !'rom Llw gall· or Lh ' lllOU nla.in s, when the 'l'riaKsie and ,J II l'aRHiC bed ' are hown. The fall s of LlL<' MiHSOIHi, e. ·tt•ntl i n cr f'o1· a d iHUlll ·o of 20 or 30 miles, cut Lhcir way thro u ~rh a grcaL thiekneRs or 'O IIlpaet 'l'rifLH ·ic rock . B •low the falls, the cha.nnd makes its way through th • oft yi •!ding clay:-; (I EO(; ItA I'III ('A 1.. 11 nnd snndK of th<• ( ' I'( tam•otls lwd ~ for abont, 2fi0 1nilPs, will1 the I'X<Wplion or tho .Judith 'l'prliary Lm sin, wlii<dl is about 40 ll l ileK in lt>ngLh. 'l'hl' ( 'I'Piaei'O tls lwclR tlwn I'P:l. p[lt '<ll", t•xi<'IHiing IIC':trly lo IIH• 1nouth of lli\' J\lilk H.il'l·r, wh<'n' 1111' Lignil1• 'l'prli ary f'or111:Ltion:-; 1'0111111\'llCO. TlH'Hl' ar<· nlso t·omposl'd of' K:tiHb, III :LI"ls :LIHL clays. aK til<• !'liamd<•r ol' tl11• l':tllt·y will ,;how. 'I' ll<• rivPI' flowH llii"OII~h llll'SI' Tt•l·tinl'j' ht•ds lo llw n10ulh of' ll t•art Hi vl'r lH'Iow l•'orl l ' nion, a dislallt'l' of' 11\':trly 2.iO 111il •s, ll"lil'l'(' l hP ( 'n-l:ll'l'OIIK I"OC'kR < ~ O IIH ' lo L\1(• .'l ll"fh<:l' :tgaill. '1'\i i'KI' \;J[ler 1"0\'kH (•XtPnd to within a Khnl'i diKtanC'I' of' Counci l Blnll's lllOI'l' l11an ,,()0 mill's. I l1a V1' Pst inlal t•d l\11' di KI:t ll(:l'S in :L stmig hl. lin l' aH llt•a1·ly as po::;sibl<' .. ln sL ahol't' C01 111<~ il Bini!'!:! the eoal llii'HH UI'I ' linH·KIO IH'H <'O ITIIIH'II I'I', nnd fliP valll'.\' or l\1 (' J\li HHO IIri g radually b(•('O illi 'S 11101'1' I'I'St.rid •d, Lhough it. is st.ill ol' 1n odt •1·atn width below tltt· 111011lh of' tilt' 1\ansaH. '!'li t• Yt•llowKIOII t' HirPr i · hy f'a1· till' largPRI hrnnl'h of t\11• l\li~s011ri, :1nd for 4()0 111ili'H, 1'1'0 111 its lli OI I(h up, it Kt'<'niK to bt• :tR larg<· nK 1111• 1\lis:-;onl'i itst'lf' 1'1'0111 Fort l ' nion to l•'orl Pi <'l" l'<'. II iH 11a1·igablt•l'or larg<' ::;t 'lliiH'I'::l clnring l\11' Hpri ng an<l t':trly Kllllllll<'r t'ol' :300 o1· ·JOO milt•::; abOI'<' ilK jundion ll"ith lil t• 1\lissouri. This ril'<'l" :ilKo faki'H its riH<' in lll<' nmin di1·idl' of t il <• Hoeky 1\lonntains, 111'a1· latilucl~· 44~ < and lonh"it udt• 110°, aH Hll lll <' :-;uppoK<' inn lakl' l':tll e<l Yl'llow!:liOIIt' l ~ai<P, wliiC'li iH :tbo ut GO mii<·K long and 10 to 20 widt•. I t:-; <·hannl•l i,; f'ol'ln l'd in I'<H -1-K si 1nilnr to t \i o::;t• of UH• ~ l i Kso n ri , ahonL 400 lnilt•s of' il :> <'OIII'K<' paKH ing Ll1rong lt Lig nito '1\·rliary lwd,;. '1'\iu (:hanu·LI'r of' its l'nlky iH Vt' I'.Y sinlil:w to th:Lt of' Lht• .1\Jissoul'i. .1\loHL or 1111 irnportan l lll'llll('lll•::; of' tlliH riv ' I' I hal'(' alllldt•d fo in I he }ll'l'('l'ding pmtion of' l lii :-; ·haplt•1·. 'l'ong nt• and Powtlt' l" H.i vP rs, which an• qnitt• long bmnl'h ·s, havt' lltPir o1·igin in tlil' Big liorn Mou ntains, thl'ir l'il<UIIII'IH ·ulling lhrough llu• dill'i.'n'll l rocl s llmt sU I'I'Ound th Rip; ll orn mngl'. 'l'onguc Hi1•er· is IlPari. 1.10 milt•H in ll'ngl\1, and ll ow:; f'o1· till' most parL thi'OtJO'h the !:!O f'L yi<·lcl ing roeks of th • Lig nito 'l' •rli iLI',}'. Powdt• l' H.iv 'I' iH from 2fi0 lo aoo lllil i'S in l<•ngtli and also fiOW l"J llPal'ly all iiH ('()III"Sl' t\irougl1 t \i l' H:llll (' 'l'l'l'li:tl'.)' b1•cl ·. Passing l>P low l•'o rL 'Union wn obH('I'VO on tho l'igl1t sitlt of t\10 MiHSOUl'i Rivl'r s 'VI'I'al lan.r riv ' 1':;, as LiUIP .l\ l iH!:lOII I'i Birr L<nif'<' ll •ar' ....... ' t:> . ' ~.~, Cannon Ball , l mnd, 1ol'l•au, amt Big ' IH'Yl' nlr c•. 'l'lw Lilli • Mi '!:!Ouri n•cPives a - m<tll po1-tion of' iL:; waL 'I'S f'rom tlw Blaek Hill , but 1110 t of' it bmn('h' · liav Lh<'ir· or.ip;in in the pmirit>. '1'\io Bi" heyt'nnc though 1'\'C ivin rr 1110 t f' its wal<' l' from th' Blal'k llills, tak it ri ::; • far |