Will be Delivered by Prof. Rotch on "Aerial Navigation" at 8.

The first Union lecture of the year will be delivered by Professor A. Lawrence Rotch h.'91 on "Aerial Navigation," in the Living Room this evening at 8 o'clock. The lecture will be illustrated and will be open only to members of the Union.

Professor Rotch is professor of Meteorology in the University, a position which he has held since 1906. He was graduated from the Massachusetts Institute of Technology in 1884, and in the following year founded, and has since maintained, the Blue Hill Meteorological Observatory, famous for its investigations of the clouds and for employing kites to obtain meteorological data. In 1889 he was a member of the International Jury of Awards at the Paris Exposition, and was then made Chevalier of the Legion of Honor. He has also received a number of Prussian orders, in recognition of his efforts to advance our knowledge of the atmosphere. He has taken part in many scientific expeditions in all parts of the world, and is also will known as an editor, and author of scientific articles.