2,56 An Anahjts oftwa Mineral Spring ( 



but from this cleft the water rifes with violence to the level 

 of 4 feet above the furface of the ground •, and it affords a 

 conftant and copious fupply of frefh water. 



I. ON TH! GASEOUS FLUIDS. - , 



The water, when frefh drawn, fmells of fulphurated 

 hydrogen, or hepatic * gas ; but it quickly becomes inodor- 

 ous by expofure to the atmofphere. I have obtained no 

 more than 4 cubic inches of gafeous fluid from a wine- 

 gallon of the water. Of thefe, hardly half a cubic inch is 

 abforbed by the water ; and, 1. Nitric acid dropped into this 

 folution caufes a minute precipitate of fulphur-, hence fome 

 hepatic gas has been expelled by the boiling. 2. I put fome 

 of the water, which had not been boiled, into a bottle, leav- 

 ing a part of the hottle empty : I then filled the bottle en- 

 tirely with lime-water, and flopped it A white precipitate 

 fell, which, with the addition of diftilled vinegar, effervefced 

 fenlibly, but not ftrongly. The half cubic inch is, therefore, 

 moftly carbonic acid. 3. Into the portion of the air which 

 was not abforbed by water, I plunged a lighted candle ; it 

 was inftantly extinguifhed. This portion is, therefore, 

 azotic gas. 



II. THE SPONTANEOUS PRECIPITATE. 



A fediment falls to the bottom, and adheres to the fides 

 of the bath. It is of a yellow colour, and acquires additional 

 brightnefs by expofure to the atmofphere. A fimilar fedi- 

 ment may be fcparated by boiling the frefh water. From a 

 gallon of water, .75 of a grain is procured. This diffolves 

 readily in acids, and fhews all the common and well known 

 appearances of o yd of iron. It muft have been united with 

 the carbonic acid, which has been already detected. (1, 2.) 



* I muft take leave to retain this name in the following pages, pre* 

 ferring it (i{ for no better reafon, at leaft for its fhortnefs) to the com- 

 pound term. 



III. SOME 



