METHODS OF PREPARATION. 53 



VI. DRUGS, PERFUMES, AND CHEMICAL PRODUCTS. 



30. MANUFACTURE OF PERFUMES. 



31. MANUFACTURE OF IVORY-BLACK. 



32. MANUFACTURE OF PRUSSIATES. 



33. MANUFACTURE OF MUREXIDES. 



34. PREPARATION OF COCHFNEAL COLORS. 



35. MANUFACTURE OF INKS FROM ANIMAL SUBSTANCES. 



36. PREPARATION OF ALBUMEN. 



37. MANUFACTURE OF PEPSIN. 



38. MANUFACTURE OF PHOSPHORUS. 

 30. MANUFACTURE OF SAL AMMONIAC. 



40. MANUFACTURE OF AMMONIA. 



41. MANUFACTURE OF ALBUMEN PREPARATIONS. 



42. MANUFACTURE OF PROPYLAMINE. 



43. MANUFACTURE OF FORMIC ACID. 



44. MANUFACTURE OF CARBAZOTATES. 



VII. MANUFACTURE OF FERTILIZERS. 



45. PREPARATION OF GUANO. 



a. Model of fish-guano works: 



Grinders and pulverizers. 



Mixers. 



Guano in its various stages, with its ingredients, South Caro- 

 lina phosphates, Navassa phosphates, scrap, (crude, and 

 dried,) sulphuric acid, kainit'e, screened and unscreened 

 guano, and sea-weed used in preparation. 



VIII. LIMES. 



46. BURNING OF LIME. 



a. Models of kilns for burning shells. 



IX. PRESERVATION OF THE ANIMAL FOR SCIEN- 

 TIFIC USES. 



47. APPARATUS FOR MAKING AND PRESERVING ALCO- 

 HOLIC SPECIMENS. 



a. Tanks and jars : 



Agassiz collecting-tank. 



