the National Museum collection (USNM 233511). It was 

 made in the Museum in about 1900 by C. R. Luscombe. 



The Arabian was similar in design to the three "grass- 

 hoppers" that have survived, but differed from them in 

 many small ways. Its two cylinders, for example, had a bore 

 and stroke of 12 and 22 inches. This bore was fractionally 

 less than that of the other three. Also, its weight with fuel 

 and water, 7V2 tons, was about a ton less than that of any 

 of the others. 



The extent to which the Museum's model represents these 

 slight differences between the Arabian and the "grass- 

 hoppers" that followed it cannot now be determined. Most 

 of these differences would be impossible to reproduce on 

 such a small scale. It is entirely possible that the model rep- 

 resented no particular "grasshopper," and the name Arabian 

 may have been selected by chance. 



A detailed description of the construction of the Arabian 

 and a discussion of its performance characteristics appear in 

 the eighth (1834) and ninth (1835) annual reports of the 

 Baltimore and Ohio Rail Road Co. 





Figure 65. — Model of Davis and Gartner Arabian, 1 834. 



82 



