[29] 



LISTS OF DREDGING STATIONS. 



STATIONS FOR 1875-Concluded. 



901 



STATIONS FOR 1877, 1878, AND 1879, WITH HEADQUARTERS AT SALEM, 

 MASS., HALIFAX, N. S., GLOUCESTER AND PROVINCETOWN, MASS. 



During these three years the dredgings were carried on from the 

 TJ. S. Str. Speedwell, commanded in 1877 by Lieut. Commander A. G. Kel- 

 logg, in 1878 by Lieut. Commander L. A. Beardslee, and in 1879 by Lieut. 

 Z. L. Tanner. In 1877, headquarters were first established at Salem, 

 and the stations made from there covered the northern part of Massachu- 

 setts Bay, and portions of the Gulf of Maine, off' Cape Ann. During 

 the session of the commission of arbitration on the fishery claims, how- 

 ever, the headquarters were removed to Halifax, jST. S., and dredgings 

 were made in the waters off that coast, from the last of August to the 

 first of October. The Speedwell also made a line of stations on her trip 

 across the Gulf of Maine, from Cape Ann to Cape Sable, 1ST. S. In 1878, 

 with headquarters at Gloucester, Mass., the area dredged over included 

 the northern and central parts of Massachusetts Bay, and the Gulf of 

 Maine, off Cape Ann. In 1879, the dredging grounds were the southern 

 part of Massachusetts Bay, and the Gulf of Maine, off Cape Cod. The 

 bottom temperatures in 1877 were mostly taken with Miller- Casella 

 self-registering, deep-sea thermometers, but in 1878 and 1S79 Negretti- 

 Zambra thermometers were used for that purpose. All the tempera- 

 tures for 1879 were taken with more than usual care, the thermometers 

 employed being frequently compared with a reliable .standard. 



