SECTION F. 



PROTECTION AND CULTURE. 



1. INVESTIGATION. 



{as prosecuted by the united states fish commission.) 

 1. Methods of woek. 



Apijaratus for collectiug specimens. (See under B.) 



Apijaratus for iibysical researcli. 



Thermometers nsed by Dr. J. H. Kidder in investigating the tem- 

 perature of fishes at Provincetown, Mass. Manufactured by 

 Tagliabue, X. Y. 



32745. Standard thermometer. 



32746. Set of six observatiou tliermometers covering 30^ to 100° F. 



32747. Curved thermometer. 



Appliances for measurement. 



Scales for taking- proportional measurements of fish, preparatory to 

 writing descriptions. 



Appliances for working up results. 

 Coast laboratories. 



Photographs of the U. S. Fish Commission Biological Laboratory at 

 Wood's Holl, Mass. Exterior and interior views. U. S. Fish 

 Commission. 



Photographs.^ 



Headquarters of the United States Fish Commission, Wood's Holl, 

 Mass. 



Little Harlior of Wood's Holl, Mass., with headquarters of U. S. Fish 

 Commission. 



Harbor of Wood's Holl, Mass., from the wharf of the Fish Commission 

 laboratory. 



Harbor of Wood's Holl, Mass., with U. S. Fish Commission fleet for 



1871. 

 Village of Wood's Holl, Mass., with the Pacific Soluble Guano Com- 

 pany's Works. 



'The photographs here enumerated are on exhibition. Many others are in pos- 

 session of the Commission. 



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