78 EEPORT ON THE OPERATIONS OF EXCHANGES. 



Bureau of Steam Engineering : 



Experiments on relative merits of screw propellers. 8vo. Paper. 

 Eeport on the Herreshof system of Motive Machinery. 8vo. Paper. 

 Eeport on the Machinery of the " Anthracite." 8vo. Paper. 

 Eeport on the Standard Gauge for Bolts, Nuts, and Screw-threads. 

 Svo. Paper. 



Fost- Office Department. 



List of Post-oflBces of the United States, February 1, 1881. 

 Bulletin, City Post-Offlce, Washington, D. C, 1881. 8vo. Paper. 



Smithsonian Institution. 

 Bureau of Ethnology : 



Collection of Gesture Signs. 4to. Paper. 

 Study of Mortuary Customs. 4to. Paper. 



Department of State. 



Commercial Eelations of the United States : 



No. 2, November, 1880. Svo. Paper. 



No. 3, January, 1881. Svo. Paper. 



No. 4, February, 1881. Svo. Paper. 



No. 5, March, 1881. Svo. Paper. 



No. 6, April, 1881. Svo. Paper. 



No. 7, May, 1881. Svo. Paper. 



No. 8, June, 1881, and index. Svo. Paper. 



No. 9, July, 1881. Svo. Paper. 



No. 10, August, 1881. Svo. Paper. 

 Eegister of the Department of State, December, 1880. Svo. Paper. 

 Result of Investigation " American Pork." Svo. Paper. 

 Eegulations for the use of the Consular Service. Svo. Paper. 



Treasury Department, 



United States Coast Survey : 



Atlantic Coast Pilot, Boston to New York. Svo. Paper. 

 Deep-sea Soundings and Dredgings on Board the United States 



Coast Survey Steamer Blake. 4to. Paper. 

 Methods and Eesult« ; general properties of the equations of steady 



motion. 4to. Paper. 

 Tide Tables : 



For the Atlantic Coast, 1881. Svo. Paper. 

 For the Atlantic Coast, 1882. Svo. Paper. 

 For the Pacific Coast, 1881. Svo. Paper. 

 For the Pacific Coast, 1882. Svo. Paper. 

 Light-House Board : 



Annual report for the year 1880. Svo. Paper. 

 Laws and regulations relating to the Light-House Establishment 

 of the United States. Svo. Paper. 



