Abstract
THE Yerkes Observatory, which has recently been completed and inaugurated, contains in its instrumental equipment the largest refractor in the world, the diameter of the object-glass spanning 40 inches.
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LOCKYER, W. Large Refracting and Reflecting Telescopes. Nature 57, 200–201 (1897). https://doi.org/10.1038/057200a0
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DOI: https://doi.org/10.1038/057200a0