PT - JOURNAL ARTICLE AU - Theophilus Parsons TI - On the origin of species AID - 10.2475/ajs.s2-30.88.1 DP - 1860 Jul 01 TA - American Journal of Science PG - 1--13 VI - s2-30 IP - 88 4099 - http://www.ajsonline.org/content/s2-30/88/1.short 4100 - http://www.ajsonline.org/content/s2-30/88/1.full SO - Am J Sci1860 Jul 01; s2-30