374 Salts of Iron. 



then filtrated, it is found fimilar in its colour and phyfical 

 properties to the weakeft folutions ot the other oxygenated 

 falls. 



When the fulphate and muriate of iron, at the minimum 

 of oxidation, are obtained in the folid form, by evaporation 

 from their folutions, they appear in regular cryftals, which 

 in each fait are a different Ihade of a very pale green colour; 

 their taftes are exaftly fnnilar, being allringent, and leaving 

 in the mouth the fentation of fweetnefs. 



The lead oxygenated nitrate of iron cannot eafily be pro- 

 cured pure in the cryllallized (late; for when the folution of 

 it is heated for any length of time, a new arrangement of its 

 principles takes place ; portions of the acid and of the water 

 of the folution are dccompofed ; in confequence of which 

 ammoniac; is formed ; and an oxygenated nitrate of iron, with 

 excefs of bafe, is depofitcd. 



Amongft th'e falts of iron, at the minimum of oxidation, 

 I have found the muriate the mod convenient for exhibiting 

 the experiments of Prouft, and in eudiometrical procefl'es 

 with nitrous gas. It is more foluble in water than the ful- 

 phate, and very much more foluble in alcohol. D. 



ERRATUM. 



Page 82, lines 3 and 4, for " organ of inftina anei," read " organ 



oflnitinao/." 



INDEX 



