Dr. L. J. Henderson '98 will deliver the first of a course of two lectures on "The Thermochemistry of Organic Compounds" in Boylston 9 this afternoon at 3.30 o'clock. The second lecture will be given at the same place and hour on Friday afternoon.

Although intended especially for members of Chemistry 5 and 6 and other advanced students, the lectures will be open to all members of the University.