Methylene

1885 Scientific American  
Lately rea d before the Manchester Literary ami Philosophical So-l torted by refraction, went ou t of sight at sma11er depths. ciety. Thedisappearance seemed to depend upon the confusion © 1885 SCIENTIFIC AMERICAN, INC.
doi:10.1038/scientificamerican03141885-7662bsupp fatcat:h6rycbt2crdlfk3e54bsioasey