LXX. E. K. SCOTT. 
(x) The ideal use, however, would be to manufacture 
artificial nitrate manures with the same water that goes 
to irrigate the land. 
(0) The consumption of such manures produced by elec- 
tricity is bound to rapidly increase as more and more land 
is put under cultivation and the Chilian nitrate deposits 
become worked out. The limit of the latter is said to be 
another 30 years. 
(p) Power at £2 15s. per electrical horse power year, 
which is the price suggested by the Queensland Govern- 
ment, for current from the Barron Falls is equal to about 
; of a penny per B.O.T. unit if used right through the day. 
(g) A high load factor is more a necessity for hydro 
electric plants than for steam, and in case there are peaks 
they are better cared for by water storage than by electric 
storage. 
(*) Hydro-electric power houses are immensely superior 
to steam plants, because of the simplicity of the building 
and the attendance being about one-fourth, whilst fuel, 
which is the biggest item in a steam plant, entirely dis- 
appears. 
(s) The Pelton wheel is the cheapest form of prime 
mover there is, and it would be the type employed at 
Barron Falls. It works efficiently on heads of over 2000 
feet. ) 
(t) High head falls are preferable to low heads, because 
the speed of the water wheel is higher and this cheapens 
the electric generators. The cost of hydraulic works is 
also lower. 
(w) There are many electric power transmissions over 
100 miles in length and one over 200 miles, so that 
transmissions of say 70 miles from Trawool to Melbourne 
