77 
in the North West of Tasmania . 
—and finally, between Emu Bay, Cape Grimpf,and Arthur’s 
River. I derived much gratification and information from my 
geological researches in that part, but found nothing worthy of 
notice in reference to economical mineralogy, except perhaps 
the mineral waters, long known to exist, about 15 miles west 
of Circular Head, but which have never before undergone any 
analysis : the ingredients they contain, and their medical pro¬ 
perties, were therefore hitherto unknown- I have endeavoured 
to ascertain both—the latter on my own constitution, the 
former by chemical analysis. They belong to the class of 
Carbonated Waters, containing— 
Carbonic Acid Gas, 
Muriatic Acid Gas, 
Carbonate of Soda, 
Chloride of Sodium, 
Suljdiate of Soda or Magnesia, 
Oxide of Iron in the state of a Peroxide, 
A slight indication of Lime.* 
From this examination, and from experiment, I am led to 
conclude that they arc aperient and tonic : they are also sufii- 
ciently disgusting to the palate to pass for highly medicinal. 
A vertical section of the country between Launceston and 
the Hampshire Hills, taking it through the line of the (so 
called) Company’s Road, will give you abetter idea of this 
part of Tasmania, and its present communications, than any 
description which I could offer to you. 
From Church Square, Launceston, 140 feet above the level of 
the Sea. 
Above the level 
« Distance. of the Sea. 
To Carrick. lOmiles. 500 feet. 
Westbury. 10 .. 091 
Caldstock. 11 .. 901 .. 
Mr. Reid’s Farm. 15 .. 903 .. 
Circular Pond Marshes. 10 ..1140 .. 
River Mersey, bed of. 0 .. 1012 .. 
Gad’s Hill . 4 .. 2588 .. 
River Forth, bed of . 0 .. 790 .. 
Four-mile Hill. 4 .. 2957 .. 
Middlesex Plains (V.D.L. Company’s 
Station). 7 .. 2709 .. 
/ Vale of Bclvoir . 12 .. 2930 .. 
3lu.FF, Black/Rangc . 2 .. 3381 .. 
Race-oourse (source of River Severn ) 7 .. 2402 .. 
leven/ Chilton (V.D.L. Company’s Station) 15 .. 2100 .. 
, Hampshire Hills, (ditto). 22 .. 1348 .. 
* From the want of apparatus, and other conveniences, T cannot at present 
send you an accurate account of the quantities ia which the different in¬ 
gredients present themselves. 
