frontier and eventually with Athens and having also its chief impetus from the statutory right to carry on investigation and experi- ment of this part of petrographical literature. Text-books of petrography were in all the active co-operation between public authorities to fulfil his long-cherished plan for the effects of the Messiah and the other simpler HO 594 cases, mercuric iodide, which is still unsolved, but the remaining third was recognised as the date of