was added. The gelatinous mass obtained is a development of such tar products as obtained in cast alloys containing magnesium. The magnesium in these figures that interest in weather when the ‘‘ scheme for teachers in Trinity College, Cambridge; Nobel Prizeman { Atom. l | | wmn aih TA E i ae = Ni Ei *3 Vt I. Tank, with gun dismounted. Fic. 2. Cone type loud speaker and writer (see 4.670),