Algunas consideraciones sobre el daltonismo : tésis inaugural
A Spanish-language medical thesis on colour blindness by L. Castro, printed in Mexico in 1881 by Imprenta de Horcasitas Hermanos for academic examination. Both pictures are large decorated initial letters, one an ornate capital H and the other an intricate capital I, set in flourishing scrollwork with hatched shading and curling tendrils. A designer could take from them a model for ornamental drop caps and the interplay of letterform with spiraling foliate filigree.
