RT Journal Article SR Electronic T1 On the projection of lines of equal pressure in the United States, west of Mississippi River JF American Journal of Science JO Am J Sci FD American Journal of Science SP 361 OP 372 DO 10.2475/ajs.s3-21.125.361 VO s3-21 IS 125 A1 Hazen, H. A. YR 1881 UL http://www.ajsonline.org/content/s3-21/125/361.abstract AB