RT Journal Article SR Electronic T1 Calorimetric investigations JF American Journal of Science JO Am J Sci FD American Journal of Science SP 348 OP 355 DO 10.2475/ajs.s3-1.5.348 VO s3-1 IS 5 A1 R. Bunsen YR 1871 UL http://www.ajsonline.org/content/s3-1/5/348.abstract AB