£32 On the Jffinities of 



Th'.s mixture wa.> easily reduced, and a perfect result ob-> 

 talned. A smooth, stamed, shining metallic splierulc was 

 obtained weighing 17 arains : equal to '\\ per cent. 



The oijai^s, as is usual in the early stag^cs of separation, 

 was very black and dense, and its upper surface was covered 

 with enamel of purple oxide. 



Exp. If. 400 grains of roasted calcareous ironstone, 

 20 ~. of carbon, or l-20th. 



The fu ^ion of this conjpound atlbrded a handsome shaped 

 button of metal which weighed 30 grains; equal to ~\ per 

 cent. The glass was nearly the same as obtained in last 

 experiment. The oxide enamel was more shiniua, and not 

 so deeply incrusted. 



Exp. III. 400 grains of roasted calcareous ironstonCj, 

 27 ' of carbon, or 1-1 5th. 



The .glass obtained in this fusion was in thin fragments, 

 possessed of a dull amber shade. A smooth skinucd me- 

 tallic button \\ as obtaintd which weighed 6o grains, or 15 

 per cent. 



Exp. IV, 400 grains of roasted calcareous ironstone, 

 40 of carbon, or 1-lOth. 



There resvilted from the fusipn of this compound an ele- 

 gant crystallized button of cast steel, the surface of which 

 was covered with a variety of prismatic colours. 



The weight of the regulus was found to be I Ki grains; 

 equal to 28 per cent. 



The glass bad received a very perfect imp-cs-ion from the 

 button of steel, and contained in concave lines an exact 

 copy of the crystallization. 



Exp. V. 400 grains of roasted ironstone, 

 534- of carbon, or 1 -7th. 



The result of this experiment was a perfect fusion, ac- 

 companied by a very fine button of crystallized cast t- el. 

 Upon the upper surface there were several circular spqls of 

 a bright silvery colour, marked with the most minute, yet 

 perfect, lines of crystallization. This result was found to 

 weiirh 14ii grains ; equal to 36^ per cent. 



Exp. Vi. 400 grains of roasted calcareous ironstone, 

 SO — — of carbon;, or l-5lh. 



This compound was exposed to 160° of Wcdgcwood. 

 When cold I found the following result: 



A considerable portion of the mixture was found upon 

 the surface ol' a pure ilinty glass. Tiiis v/as interspersed 

 with a number of globules of cast iron beautifully carbu- 

 rated. One solid mass was found of the quality of vyhite 

 cast iron, which, with the glooules, amounted to 1 30 grains-; 



bcinsc 



