72 CENTENNIAL EXHIBITlbN. 



A. — The ^Yar Department. 



1. The Signal-Service Bureau. — In this was sbown the apparatus of 

 the Signal-Office proper, with its field telegraph and wagons, instru- 

 ments, &c., and that of the weather-observation division, with its self- 

 registering and other meteorological apparatus. Here observations 

 were made and recorded, and a copy of the daily weather bulletin 

 posted. 



2. The Ordnance Bureau. — Here were shown all the machinery, in work- 

 ing operation, for the manufacture of cartridges and of the Springfield 

 rifle, together with a series of models of ordnance of different patterns, 

 shot, shell, &c., and outside the principal building was a laboratory 

 for illustrating the methods of testing ordnance and powder. 



3. The Quartermaster'' s Department. — This displayed specimens of the 

 uniforms of soldiers at different periods in the history of the American 

 Army, the horse-equipments, tents, blankets, &c., as also a veterinary 

 display illustrating the diseases of horses' feet. 



4. The Engineer Bureau. — Here were shown models of river and har- 

 bor improvements, including that of the excavation at Hell Gate, sam- 

 ples of maps and charts issued by the bureau, &c. 



5. The Medical Department. — The exhibit of this department of the 

 Army consisted of a model hospital of the size and equipment of those 

 of usual construction at military posts. Here were the appliances used 

 for keeping and transporting sick and wounded on land and water, the 

 medicines used in the Army, surgical apparatus, and photographs and 

 engravings illustrating the surgical history of the Army, «&;c. 



B. — The Navy Department. 



1. Navy Ordnance Bureau. — In this section were exhibited the differ- 

 ent large and small arms used by tlie jSTavy at present and in the past, 

 illustrations of the torpedo system, &c. 



2. Bureau of Steam- Engineering. — This embraced specimens of the dif- 

 ferent forms of engines used in naval vessels. 



3. The Bureau of Construction and Repair. — This exhibit included two 

 large working models of the Antietam, one fifty feet long, and serving 

 as a trial-ship for the cadets at Annapolis ; also a model of a newly-con- 

 structed monitor, and a full-sized monitor- turret, with its guns, was dis- 

 played outside of the building. 



4! Bureau of Yards and Doclis. — This showed various models of the 

 different dry-docks belonging to the United States Navy. 



5. Bureau of Medicine and Surgery. — This presented an exhibition of 

 the various drugs, medicines, food, &c., as prepared for use on ship- 

 board, together with all the equipments of naval hospitals, models of 

 hospital-ships, «&c. 



6. Bureau of Equipment. — Here was shown ships' galleys, boat-stores, 

 uniforms of the Navy in different periods of its history, specimens of 

 rope, bunting, signals, and various patterns and forms of flags. 



