valu- stopcock nea/- the bottom of the able are the scientific results ac- tank. Fresh water can be poured cruing from this line of work. through an opening in the cover The writer was at the Yerkes plate. The device renders it pos-. Observatory last summer, taking sible to collect the pollen of… … T. Yerkes, is situated seventy-five the apparatus and the walls. The Brace spectrograph fitted to the Yerkes telescope. miles from Chicago on the shores vessel was filled with clean water poured in through the opening at {Continued, on page 495.) PHOTQaBAPHIJra A fTAB IJJCXBUlt,
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