in the Manufa5ur£ of Crude Iron. 5^ 



tlie carbonic acid communicates to it the red colour. I 

 found it compounded as follo!.vs: water of cryftallifation and 

 carbonic acid _ _ - 39-57 



Silex _ _ . - 2-58 



Clay » - ,- - I-I2 



Lime - ^ - , 5673 



IQO parts. 



Campbletown lime^ftone on the Argyle coaft. — This is a 

 very dark blucifh-coloured lime-ftone, of a large granulated 

 metallic fratlure, hard and refraftory ; it prefents no fpeci- 

 m«;ns of marine remains, but abounds with a common caU 

 careous fpar, in which regular form is perceptible ; when 

 calcined it retains a delicate tinge of blue colour. I found 

 the component parts of this ftone to be, water of cryftallifa* 

 tion and carbonic acid - -^ 4i'4* 



Clay - - - 2*407 



Silcx , . - 2-92 



Lime - e ., 53*253 



100 parts. 



Thornton lime-ftone, parifh of Killbryde.-— This is a light 

 blucifli clay-coloured lime-ftone, fufceptible of a fine polifh, 

 and abounding with a great variety of marine (hells of vari- 

 ous fizcs; the fchiftus contains an infinite number of the 

 remains of fmall fifties, ftiells, 8cc. It yielded water and 

 carbonic acid - • ^ 43'9i 



Silcx - - - - 4-67 



Clay . - , ,5 



Lime i. • • • 5^*9* 



100 pa-ti," 



Crcfiibafkct lime-ftone, fame parlfti.— This ftone greatly 

 rcfcmble? the former, Init poftcffcs a greater variety of quality, 

 [omciiiuvs inferior, byl contains very few ftiells or marine 



L 3 remains. 



