OME years ago Armstrong arid Miller3 made a study of the 1 Read at the Brooklyn meeting. August 15. 1 3 4. "he work described in this paper formed the basis of a thesis presented to the Faculty of the Rose Polytechnic Iustitute by 3fr. W. h1. Bliuks and Jfr.. 4 V. H. Mory for the degree of Bachelor of Scieiice. a]. Chrm. SUC., (London) 49, 74, (iSs6; 4 1. Sor. (:hem. I d. , 2884, 463. We are indebted to Mr. W. B. Landon of Lafayette College for this statenient, as the Journal is not accessible to us.