It effervesces less freely with acids than pure limestone.
"Geology"
James Geikie
It effervesces much more slowly and feebly with acids than common limestone.
"The Student's Elements of Geology"
Sir Charles Lyell
But would she have been so emphatic had she lived to witness the printing-presses spouting forth that frothy flood which effervesces round the more serious writings of to-day?
"The Book-Hunter at Home"
P. B. M. Allan