Vols.11-20, 1845-54 also called new ser., v.1-10; v.21-25, 1855-59 also called ser.3, v.1-5; v.26-29, 1860-63 also called ser.4, v.1-4; v.31-34, 1865-68 also called ser.5, v.1-4.
Reproduction Note:
Microform. New Haven, Conn., Research Publications, 1977. 8 microfilm reels ; 35 mm. (American natural history).