BOOK VI. 



177 



A— Sump. B— Pipes. C— Flooring. D— Trunk. E — Perforations of trunk. 

 F— V.^LVE. G — Spout. H— Piston-rod. I— Hand-bar of piston. K — Shoe. L — Disc 



WITH ROUND openings. M — DiSC WITH OVAL OPENINGS. N — CoVER. O — ThIS MAN IS 

 boring logs AND MAKING THEM INTO PIPES. P— BORER WITH AUGER. Q— WiDER BORER. 



