176 ANIMAL RESOURCES AND FISHERIES OF UNITED STATES. 



VII. MANUFACTURE OF FERTILIZERS. 



45. Preparation of guano. 



model of Hsli-gaaaBio ivorks. 



Grinders and pulverizers. 

 Mixers. 



25822. Model of guano-mixer. Patented April 27, 1867. Poole and Hunt, 

 Baltimore, Md. 

 This mixer is employed in the fisli-gnano works for the purpose of 

 thort)ughly mixing the fish-scrai) with the mineral phosphates and sul- 

 phuric acid. 



Guano in its various stages, with its ingredients, South Carolina phos- 

 phates, Navassa phosphates, scraj) (crude and dried), sulphuric acid, 

 kainite, screened and unscreened guano, and sea-weed used in i^repara- 

 tion : a full series of these is exhibited in the case of Guanos. 



VIII. LIMES. 



4G. Burning of lime. 



models of kilBi§ foa' towirBiiia^ shells. 



IX. PRESERVATION OF THE ANIMAL FOR SCIENTIFIC 



USES. 



47. Apparatus for making and preserving alcoholic speci- 

 mens. 



Taiaks anad JaD*s. 



Agassiz collecting-tank. 



Army collecting-tank. 



Museum storage-tai.k, Agassiz model. 



Anatomical jars. 



Self-sealing jars used in collecting. 



Yials. 



Syrirages for iBaJectiBBg. 



IraSataMe l>a§^s. 



Pfl'eseiii'vative Biiixtiiares. 



Alcohol. 

 Glycerine. 



