176 ANIMAL RESOURCES AND FISHERIES OF UNITED STATES. 



VII. MANUFACTURE OF FERTILIZERS. 



45. Preparation of guano. 



Model of* li§h-s'naamio iTorl^f^. 



Grinders and pulverizers. 

 Mixers. 



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

 Baltimore, Md. 

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

 thoroughly mixing the fish-scrap "with the mineral phosphates and sul- 

 phuric acid. 



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

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

 kaiuite, screened and unscreened guano, and sea-weed used in prepara- 

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



VIII. LIMES. 



46. Burning of lime. 

 ]?IodeIs of* kilfiis jTos* buimamg' shells. 



IX. PRESERVATION OF THE ANIMAL FOR SCIENTIFIC 



USES. 



47. Apparatus for making and preserving alcoholic speci- 

 mens. 



Tanks arad jars. 



Agassiz collecting-tank. 



Army collecting-tank. 



Museum storage-tahk, Agassie model. 



Anatomical jars. 



Self-sealing jars used in collecting. 



Vials. 



SyriMg-es for iMJectiMg, 



InflataMe bag's. 



Preservative loiflxtures. 



Alcokol. 

 Glycerine. 



