1824.] Mr. Smithson on some Egyptian Colours. 115 



d. Green sand and chalk. 



Lasts of salt at Kotiigsborn near Unna. 3027 



• Werl 900 



Sassendorf, near Soest. 640 



Westerkatten 500 



Salzkatten 600 



6. Tertiary formations. 



a. Sand formation (London clay). 



5667 

 48,934 



Lasts of salt at Colberg 1500 



Greifsvvalde 300 



Oldesloe 1200 



Sulz, in Mecklenburg. . 440 

 Sulz, in Hanover ...... 100 



3540 



b. Mergel sandstein (gres a lignites according to Hum- 

 boldt), from which arise the salt springs in Hungary, 

 Gallicia, and the territory of Siebenburg, which yield, 



in lasts of salt, above 225 000 



Lasts of salt from the granite and slate formation *828 



Lasts from the porphyry and coal formation \ \ 150 



Lasts from the great older sandstone formation ; — viz'. 



the red sandstone (roth todt liegendes), and that which 



lies between the hunter sandstein and the zechstein. . 01 592 



Lasts from the newer limestones, viz. the muschelkalk 



(lias), the gryphiten kalk and Jura kalk (oolite series), 



and the chalk , 40 q~a 



Lasts from the tertiary formations, viz. the plastic clay 



(bra unkoh leu format.) and London clay (sand format.) 228,540 



Article VIII. 



An Examination of some Egyptian Colours. 

 By James Smithson, Esq. FRS. 



(To the Editor of the Annals of Philosophy.) 



SIR ' Jan. 2, 182-J. 



More than commonly incurious must he be who would not 

 hnd delight in stemming the stream of ages ; returning to times 

 long past, and beholding the then state of things and men. 



In the arts of an ancient people much may be seen concei njng 

 them : the progress they had made in knowledge of various kinds- 



i2 



