jpS Mr. Morgan's Obfervations and Experiments on 

 proportion to this perfedlion. There are flames, however, 

 which coiifift of burning particles, whofe rays have partly 

 efcaped before they afcended in the form of vapour. Such 

 would be the flame of a red-hot coal, if expofed to luch a heat 

 as would gradually difperfe it into vapour. When the fire is. 

 very low under ihe furnace of an iron foundery, at the upper 

 orifice of the chimney a red flame of this kind may be feen, . 

 which is different from the flame that appears immediately after 

 frelli coals have been thrown upon the fire ; for, in confe- 

 quence of adding fuch a fupply to the burning fuel, a vaft 

 column of fmoke afcends, and forms a medium fo thick as t& 

 abforb mod: of the rays excepting the red. 



E'^perimcfits on eleSirlc light* 



If we w^ould wifli to procure any degree of certainty in any 

 hypothefis which we may form concerning electrical light, 

 perhaps the following general dedudlions may be of fome fer- 

 vice to us. 



1. There is no fluid or folid body In its paiTagc through 

 which the eledric fluid may not be made luminous. In water, 

 fpirits, oil, animal fluids of all kinds, the difcharge of a Ley- 

 den phial of almofl any flze will appear very fplendid, pro- 

 vided we take care to place them in the circuit, fo that the 

 fluid may not pafs through too great a quantity of them. My 

 general method is to place the fluid, on which I mean to make 

 the experiment, in a tube three-quarters of an inch in diameter, 

 and four Inches long. I flop up the orifices of the tube with 

 two corks, through which I pufh two pointed wires, fo that the 

 points may approach within one-eighth of an inch to each 

 z ' other. 



