They are formed when the alkalies or their carbonates act on ulmin and Humin, or upon ulmates or humates of lime, iron, etc.
"Peat and its Uses as Fertilizer and Fuel"
Samuel William Johnson
An' bein' Humin an' respectible I brought 'im in to keep 'im from freezin' t' death," said The Hopper, as though repeating lines he was committing to memory.
"A Reversible Santa Claus"
Meredith Nicholson
"I jes' been thinkin' that knowin' folks like that an' findin' 'em Humin, makin' mistakes like th' rest of us, kind o' makes ut seem easier fer us all t' play th' game straight.
"A Reversible Santa Claus"
Meredith Nicholson