42 REFERENCES 



text is devoted to the natural history of the mussel, and includes chap- 

 ters describing experiments by Dr. C. L. Alsberg to determine the avail- 

 able protein in the mussel meats, and by Dr. Donald Van Slyke, assisted 

 by Messrs. W. M. Clark and C. B. Bennett, to determine the rate of 

 digestion and proportion of nutriment absorbed from cooked mussels 

 and squid compared with beef as a standard. E. M. Smith. 



FISHERIES.— The fisheries of Alaska m 1910. M. C. Marsh and 

 John N. Cobb. Bureau of Fisheries, Document 746. Pp. 72. 

 1911. 



While the original duties of the Alaska fisheries service related entirely 

 to the enforcement of the salmon fishery laws, the scope of its usefulness, 

 and consequently of the agents' reports, has widened to include not only 

 operations and statistics but observations of all conditions affecting all 

 Alaska fisheries and, with the exception of the fur seals on the Pribilof 

 Islands, the capture of all fur-bearing animals in Alaska as well. An 

 important feature of the work in relation to the salmon is a series of 

 investigations designed to throw light on the biological phenomena of 

 the spawning runs. 



Wood and Nushagak rivers, in the Bristol Bay region, were closed to 

 all fishing in 1908, in which year, with cooperation of the packers, plans 

 were made for a count of the salmon which reached the spawning grounds 

 in Wood River. For this purpose a rack was constructed at the foot 

 of Lake Aleknagik, at the headwaters of the river, in such manner that 

 all arriving fish must pass through a gate sufficiently small to permit of an 

 accurate record of their numbers. These figures, with the known catch 

 in Nushagak Bay, outside the mouth of Wood River, furnish a census of 

 the run and hence significant information as to the increment of salmon 

 from natural spawning. Carried through several years already and to be 

 continued for several years more, such counts are expected to afford 

 definite scientific basis for regulation of the salmon fishery. Observations 

 so far indicate that the Nushagak fisheries will be maintained at their 

 present ample productiveness if 30 per cent of the run reaches the spawn- 

 ing grounds. E. M. Smith. 



REFERENCES 



METEOROLOGY.— Monthly Weather Review. 39; No. 1, pp. 1-156, charts 8. 

 Monthly Weather Review. 39: No. 2, pp. 157-315, charts 8. 

 Monthly Weather Review. 39: No. 3, pp. 317-4S6, charts 8. 



PHYSICS. — The testing of clinical thermometers. Bureau of Standards Cir- 

 cular No. 5. 2nd ed., issued June 30, 1911. 



