IIOKN EXPEDITION PHYSICAL (;EOf;RAPHY. 13 



Trickett Cicck scparale'S Cicorgc Gill llaiigo from Le.vi Range, wliich would 

 otlu'i'wi.sc (jdiistitutc one continuous range. 



Petennann Creek, after a nearly easterly enurse of about forty-lise miles, joins 

 tlie Palmer at ten or twelve miles below the Walker junction. From the Petermann 

 junction the Finke jiursues a nearly E.8.E. course for sixty miles, when it is joined 

 by a very important branch, the Hugh. This riser has its source on the northern 

 edge of the McDonnell Ranges, about twenty-tive miles west of Alice Springs, and 

 sweeping through the range at Brinkley Bluff Hows in a general E.S.E. direction. 

 The Finke is next joined on the west by the Lilla at a point thirty-two miles in a 

 direct line 8.8. K. from the Hugh junction. About thiity-six miles in a direct S.E. 

 line from the last point another creek, the Goyder, joins the Finke on the west. 

 Further south still, and to the east of Charlotte Waters, it is joined by the Coglin. 



Below the junction of this creek the Finke has no detined channel, but spreads 

 out over wide alluvial flats. Hixteen miles >S.8.E. of Charlotte Waters the tele- 

 graj)h line ci'osses Adminga Creek, which runs easterly to the Hats over which the 

 Finke waters spread. 8till further to the south the Alberga, which takes its rise 

 in the eastern extremity of the Musgrave Range, after being joined on the north 

 by a tiibutary, the Stevenson, and being then known as the Macumba, flows 

 E.8.E. tow;ii'ds Lake Eyre. It is into the IMacumba that part of the flood waters 

 of the Finke flow on their way to Lake Eyre. The greater portion, li<jwever, 

 disappears from the surface, and is absorbed by the vastly extensive sandhills and 

 plains, which stretch round the north and east sides of Lake Eyre. In the above 

 description of the Finke and such of its tributaries as occur in the area examined 

 by the Expedition, no mention has been made of the Todd, an important stream 

 which takes its rise on the northern edge of the McDonnell Ranges to the north 

 of Alice Springs. It leaves these ranges at Heavitree Gap, and at first lias for 

 many miles an easterly course, after whicli it turns S.8.E. towards Lake Eyre. It 

 is very probable, but this is not certaiidy known, that the Todd junctions with t,he 

 Finke south of Charhjtte Waters. 



{/') Lov^lh and Rate of Fall of Finke Channel. — The total length of (he Finke 

 from its source in the RIcDonnell I'anges to Lake Eyre must be about 1000 miles, 

 althouyrii the distance in a, direct line is not greater than 500 miles. A few calcu- 

 lations have been made on the rate of fall of the channel of tin; Fiidvo over 

 different portions of its course. Tlu^ dilt'erence in the altitudes above sea level of 

 the channel of the Finke a,t Mount Sonder and at the Mission Station, a distance 

 of fifty-four miles, is about I'JO feet. These tiata give a raU; of fall of aljout nine 



