360 On Flame. 



ore which is the subject of his experiments. Ores containiiij^ 

 30 per cent, and upwards of manganese, as in experiments 15 

 and 16, will fuse per se into glasses that will transmit light, and 

 in thin fragments exhibit perfect transparency. This is not at all 

 the case with ores of iron; a retention of 5 per cent, of iron will 

 give an opacjue bottle-green glass, and when it amounts to 10 per 

 cent, the glass becomes black, shining, and metallic. 



Recapitulation of the foregoing Experiynents as to metallic 

 Produce. 



^ c /u -1 I No. 1 produced 444 per cent. No manganese 



or the areil- J o i ^ i ^, j . i 



, < 2 do . . 44-,-'^ do J-th niana:anese 



laceous ore! o j t^ i f.i. 



f , ,1 3 do . . 4o do 4-th manganese 



or charcoal (.^ so 



4:th the weight 

 of the argil- 

 laceous ore 

 of charcoal 



< 



I 



LXXIII. On Flame. By J. Murray, Esq. 



To Mr. Tillnch. 



Sir, — J. ou have attached to my name the letters M.D. This 

 distinction I have not assumed, nor do I covet it. I request 

 you will rectify the error, lest my more humble eflbrts in the 

 cause of truth and science might in some instances, bv my im- 

 perfect details, detract from the superior merits of Dr. .lohn 

 Murray of Edinburgh*. By a typographical eivor wihailoived 

 is printed " hallowed." 



In some instances, by introducing into the flame of a candle 

 a spatula of ivory with gunpowder, I have withdrawn it in a 

 moist stAte; and from the circumstance that fulminating silver 

 inserted into the cone of flame has not f'een exploded for some 

 seconds, — I deem it probable that the interior is filled up with 

 aqueous matter, which emanates from the interior surface of the 

 flame, as well as e.\terior. This medium of aqueous particles 



* Identity of t)ame led us into the niittukc ulludeci to, and must plead 

 our excuse.— Edit. 



would 



