66 KEPORT OF THE COMMISSIONER OF FISHERIES. 



ouglily overhauled, all of the upper works above the iron hull beint^ 

 removed and replaced with new material. A new boiler was installed, 

 engines put in first-class condition, new interior fittings provided, 

 and certain modifications made in the arrangement of space which 

 will add to the efficiency and convenience of the vessel. As the iron 

 hull is considered to be as good as when built, it is believed that many 

 years' service can be expected from the Fish Hawlc with no extra- 

 ordinary expenditures. 



The schooner Cram^us and the smaller vessels of the Bureau have 

 been engaged as heretofore in fish-cultural work in connection with 

 the various stations. 



PUBLICATIONS AND LIBRARY. 



A new series of pubhcations of the Bureau has been established 

 in a form designated ''Economic Ckcular." These brief papers are 

 intended prunarily to be the medium of prompt report upon the 

 main features and practical results of work for which a more com- 

 plete account requiring much more time in preparation will appear 

 later. Economic Circular No. 1, "Condition of the mussel beds of 

 the Cumberland River in 1911," issued February 13, 1912, and dis- 

 tributed among the mussel fishermen and button makers, was the 

 only paper of this series issued during the past fiscal year, but others 

 of the same character were ready to appear shortly thereafter. 

 Through this series of cu'culars it will also be possible to publish brief 

 notices of other important subjects not requiring detailed investi- 

 gation or discussion but valuable as information m particular 

 branches of the fishing mdustries. 



The following documents relatmg to the Bureau's work were 

 issued during the year and seven of previous issue were reprinted: 



Natural history of the American lobster. By Francis H. Herrick. From Bulletin, 

 vol. XXIX, 1909, p. 149^08, pi. xxviii-xlvii, 42 text fig. Document 747, issued 

 July 28, 1911. 



Special investigation of the fur-seal rookeries in 1910. By Harold Heath. Docu- 

 ment 748, 22 p., issued November 10, 1911. 



The fiu"-seal fisheries of Alaska in 1910. By Walter I. Lembkey. Document 749, 

 40 p., issued November 8, 1911. 



The salmon fisheries of the Pacific coast. By John N. Cobb. Document 751, 182 

 p., issued November 25, 1911.- 



Effects of explosive sounds such as those produced by motor boats and guns upon 

 fishes. By G. H. Parker. Document 752, 10 p., issued October 12, 1911. 



Report of the Commissioner of Fisheries for the fiscal year ended June 30, 1911. 

 Document 753, 70 p., issued February 23, 1912. 



Fishes from Bering Sea and Kamchatka. By C. H. Gilbert and C. V. Burke. 

 From Bulletin, vol. xxx, 1910, p. 31-96, 37 text fig. Document 754, issued May 

 6, 1912. 



Sound as a directing influence in the movements of fishes. By G. H. Parker. 

 From Bulletin, vol. xxx, 1910, p. 97-104. Document 755, issued April 27, 1912. 



