II. On the atomic weight of glucinum (beryllium)

In this paper the author shows that no conclusions with respect to the atomic weight of glucinum can be drawn from analogy of its com­pounds with those of other metals, and that this long-disputed ques­tion can only be decided by the specific heat of the metal or by the vapour-density of some of its volatile compounds. Two determina­tions of the specific heat have been made by Professor E. Reynolds and by M. Nilson, the former of whom obtained a result of about 0.6, and the latter only about 0.4.