<P> The friars also opened many medical and pharmaceutical schools . The study of pharmacy consisted of a preparatory course with subjects in natural history and general chemistry and five years of studies in subjects such as pharmaceutical operations at the school of pharmacy . At the end of this period, the degree of Bachiller en Farmacia was granted . </P> <P> By the end of the 16th century, several religious orders had established charity hospitals all over the archipelago and provided the bulk of this public service . These hospitals also became the setting for rudimentary scientific research work on pharmacy and medicine, focusing mostly on the problems of infections diseases . Several Spanish missionaries cataloged hundreds of Philippine plants with medicinal properties . The Manual de Medicinas Caseras..., written by Father Fernando de Santa María, first published in 1763, became so sought after that it was reprinted on several editions by 1885 . </P> <P> Colegio de Santa Potenciana was the first school and college for girls that opened in the Philippines, in 1589 . It was followed by another school for women, Colegio de Santa Isabel, that opened in 1632 . Other Schools and Colleges for girls were Santa Catalina, Santa Rosa, La Concordia, etc . Several religious congregations also established schools for orphaned girls who could not educate themselves . </P> <P> In 1590, the Universidad de San Ignacio was founded in Manila by the Jesuits, initially as the Colegio - Seminario de San Ignacio . By the second half of the 17th century, the university was incorporated as a mere College of Medicine and Pharmacy into the University of Santo Tomás . </P>

Describe the different economic systems in the philippines during spanish times