BOOK VI. 



177 



A— Sump. B— Pipes. C— Flooring. D— Trunk. E— Perfor.\tions of trunk. 

 F— Valve. 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. 



