CATALOGUE OF THE MECHANICAL ENGINEERING COLLECTION. 105 



Model of Greek Scytala. (Scale 1:6.) Made in the Museum. 



The four wheels are attachfed to two thick axles which revolve 

 in transverse grooves and cut the sides of the body frame. Aristotle 

 states that the scytala, which has four "pauc" (drum-shaped) 

 wheels, " has many advantages over carts with wheels," arguing that 

 " an axis impedes the progress of wheeled vehicles by pressing on the 

 l^^l3„ Cat. No. 181,268 U.S.N.M. 



Model of Ancient Egyptian Chariot. (Scale 1:6.) Made in the Museum. 



The original chariot of the Ptolemaic Era, complete in every 

 part, made of birch wood, is preserved in the Florentine Museum, 

 Italy. The wheels, of four spokes framed around the hub, are com- 

 posed wholly of wood; the round rim is in four parts, the joints 

 being scarfed for wrapping with thongs. Cat. No. 181,264 U.S.N.M. 



Model of an Egyptian Chariot. (Scale 1 : 6.) Made in the Museum. 



The chariot was used in Egypt about 300 B. C. One original 

 wheel, together with the front and side raves, found at Dashour 

 by H. Abbot, is in the Museum of the New York Historical Society. 

 The wheel is 39 inches extreme diameter. The forked brace to 

 which the shafts are attached is also preserved. The construction of 

 the floor and arrangement of the thongs, based upon close measure- 

 ment, are hypothetical. The wheels have six spokes, with slot near 

 the hub, and felly in six pieces with scarfed joints. The tire of wood, 

 in six parts, also scarfed, is attached to the felly by a lacing of 

 tl,ongs Cat. No. 181,265 U.S.N.M. 



Model of Persian Farm Cart. (Scale about 1 : 6.) Made in the Museum. 



The cart, found in Persia in 1870, is used in Khosrovah for general 

 purposes, where wheels of the kind represented last for years. 

 The wheels have fifteen spokes ; the felly is in five parts, joined by 

 pins driven into the ends of flat spokes fitted into the rim. The 

 axles and hubs are of wood. Cat. No. 181,276 U.S.N.M. 



Model of Roman Farm Plaustrum. (Scale about 1 : 6, after has relief by 

 Lucius Petus, Rome.) Made in the Museum. 



This vehicle was used in ancient Rome in 300 B. C. to transport 

 hay and other agricultural products from the farm to the market. 

 Two wheels of solid wood are each straightened by two pairs of 

 battens set at right angles. Cat. No. 181.270 U.S.N.M. 



