(**1**8O, **1**9N) and **1**8O, **2**1O) nuclear reactions on a **1**8O target provide measurements of excited state energies at 1. 12 and 1. 59 Mev for **1**9N and at 1. 35 and 3. 00 Mev for **2**1O. The **1**9N mass is remeasured as 15. 856 plus or minus 0. 050 Mev.