SUCTION OF TRANSPORTATION AND ENGINEERING. 299 



During the .year an entire re-arrangement of the exhibition series was 

 attempted, under the following temporary classification : 



(1) Objects and implements for burthen-bearing by man and animals. 



(2) Objects and implements of human and animal traction (street- 

 railway ears excepted). 



(3) Originals, models, and drawings of stationary steam-engines. 



(4) Originals, models, and drawings of locomotives* 



(5) Models and drawings of passenger and freight cars. 



(0) Originals, models, and drawings illustrating the development of 

 the American rail and track (steam railways and horse railways.) 



(7) Models, relics, and drawings showing the beginning of the steam- 

 boat and development of marine steam-engineering. 



(8) Maps showing beginning and exteusiou of the American railway 

 systems. 



■ 



(9) Electrical machines (telegraph and motors). 



(10) Air-ships, etc. 



Owing to the nature of things, the study series is composed almost 

 entirely of drawings and other graphic illustrations, in arranging which 

 the same general classification has been temporarily adopted as pre- 

 vails in the exhibition series. 



1 cannot close this report without calling attention to the necessity 

 for additional space, iu order to accommodate the normal growth of the 

 Section. 



From personal intercourse and correspondence with a number of 

 prominent engineers and railway constructors, I feel satisfied that the 

 collection could be rapidly increased by the addition of valuable ob- 

 jects, if the space could be found to exhibit them. Iu no country in 

 the world has there been such a revolution in the methods of con- 

 structing bridges as in America, yet we are compelled to refuse to ex- 

 hibit models of the early structures, now rapidly going out of use, 

 owing to the crowded condition of the exhibitiou series. And the same 

 statement holds good in regard to historic locomotives, cars, and other 

 bulky objects, it being possible to devote only GOO square feet of floor 

 space to the locomotive and railway car. 



So much progress has been made in solving problems that have 

 arisen in connection with electric propulsion, both on land and water, 

 during the last few years, that it would seem proper to begin to collect 

 objects illustrating the early history of the devices which have gradually 

 been developed into the motors, etc., now practically successful and in 

 commercial use. 



Such a collection, if properly made, would also require considerable 

 space for exhibition, and must therefore be delayed for the present. 



