100 Biography of Johann Nepomuk von Fuchs. 
and. had mentioned as characteristic the blue color which is ob- 
tained with cobalt salts. The first industrial application of the 
soluble silicate of potash was for rendering edifices fire-proof, and 
was made in 1824 on the then newly erected Theatre in Munich, 
after the necessary preliminary trials had shown the process to 
othe chief advantages of this substance lie in 
g 
2) a a paren coherent and very durable coating, whic! 
e 
-self “‘astonished and ashamed at this—ashamed because in Ger- 
many soluble glass exists only in chemical treatises and because 
he knew with what rg ten i 
many years to contend, before he could see realized but one 
its many useful applications.” In immediate connection with 
a 
