BOOK VI. 



183 



wmmw^^ 



iim> y >f r - ^v '* "".;.;v^ ' - "' ^ '' V'>' ■ "" ' ' VyA 





A — Water-wheel. B— Axle. C — Trunk on which the lowest pipe stands. 

 D — Basket surrounding trunk. (Sixth kind of pump — see p. 184.) 



