Note VIII-49 — Chapter VIII · ANTIQUITIES OF VERA CRUZ.
Reading edition
The analysis is as follows:—quartzy sand, 31.00; silex, 13.00; aluminia and iron, 2.60; carbonate of lime, 48.00; magnesia, 2.50; moisture, 2.00; loss, 0.90. Almaraz, Mem., p. 30.