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BULLETIN 119, V. S. NATIONAL MUSEUM. 



Model of Method of Rolling a Marble Column. (Scale 1:6.) Made in the 



Museum. 



This method of rolling a load was in vogue in Greece about 560 

 B. C. It is described by Vitruvius (Book X, chap. 6) and was 

 adopted by Ctesiphon for transporting the columns from the quarry 

 to the temple of Diana at Ephesus, during the sixth century B, C. 



Cat. No. 181,257 U.S.N.M. 



FIG. 1. THE COMBINED APPLICATION OF THE HOLLER, LEVER, AND INCLINED PLANE. 



Model of Method of Rolling a Marble Prism. (Scale 1 : 6.) Made in the 



Museum. 



Vitruvius writes (Book X, chap. 6) that the stone " was 12 feet 

 long, 8 feet wide, and 6 feet high," and that " Paeonius made two 

 wheels about 15 feet diameter, and fitted the ends of the stone into 



FIG. 2. THE ROLLING LOAD. 



these wheels. To connect the two wheels he framed into them, round 

 their circumference, small pieces of 2 inches square, not more than 1 

 foot apart, each extending from one wheel to the other, and thus 

 inclosing the stone. Round these bars a rope was coiled, to which 



