PT - JOURNAL ARTICLE AU - M. Carey Lea TI - Laboratory notes AID - 10.2475/ajs.s3-7.40.376 DP - 1874 Apr 01 TA - American Journal of Science PG - 376--378 VI - s3-7 IP - 40 4099 - http://www.ajsonline.org/content/s3-7/40/376.short 4100 - http://www.ajsonline.org/content/s3-7/40/376.full SO - Am J Sci1874 Apr 01; s3-7