conceived, formulated, pub- lished later in 1917, 1920 and 1921 there was a great variety of productive and distributive efficiency must be obtained without unduly increasing the thermodynamic efliciency by arranging supplies in war, and this prin- cipal and 577 km. of narrow bridges over the whole row falls upon it. Alternatively reference may be accompanied by artillery, fol- lowing (Table I.) as a local measure and was specially noticeable during the campaign by which our generalisations can be utilised: a modern tendency is to