PT - JOURNAL ARTICLE AU - Young, C. A. TI - The color correction of certain achromatic object glasses AID - 10.2475/ajs.s3-19.114.454 DP - 1880 Jun 01 TA - American Journal of Science PG - 454--456 VI - s3-19 IP - 114 4099 - http://www.ajsonline.org/content/s3-19/114/454.short 4100 - http://www.ajsonline.org/content/s3-19/114/454.full SO - Am J Sci1880 Jun 01; s3-19