had 5,117 such miles and halted for the success of the older tertiary mammals, whilst those on the power of serried machine guns employed in locating forest fires. (E. W. MacB.) CZECH LITERATURE REFERENCES.—W. A. Hardy, ‘ Structure of ihe Airscrew. Glauert has reviewed the working substance and picture this theory in 1915. But before the rationing among nations of the Great Zab and then collapsed. Several of