[29] 



LISTS OF DREDGING STATIONS. 



STATIONS FOU 187&-Concludea. 



901 





Date. 



Locality. 



i 



ITature of bottom. 



Temperatures. 



. 



u 



^ 



1 



i 



^ 



763 



7Ci 

 765 

 766 



7C7 

 7(53 



1875. 

 Sept. 20 



20 



20 



20 



20 



20 

 20 



Off Southwest Ledge, i mile W. 



of 762. 

 Otf Southwest Ledge, i mile S. 



Off Southwest Ledge, | mile W. 



of 763. 

 On Southwest Ledge, JmileNW. 



of 765. 

 Off Southwest Ledge, IJ miles 



W. of 1^0. 762. 



9 mUes S W. of Gay Head 



e miles SW. £- W. of Gay Head. . 



17 



Gravel, sand 



o 



C4 







60 



D. 



17 



17 



18 



20 

 20 









60 

 60 

 61 

 61 



J), 



....do 







D. 



Sand 



64 

 64 





D. 



....do 



D. 



7f,a 



... do 



D. 















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

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



During these tliree years the dredgings were carried on from the 

 U. 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, K. 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, IST. 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 1879 ^NTegretti- 

 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 standardt 



