ANALYSES OF COTTON PLANT AND SEED. 193 



reaction had taken place, then boiled and filtered. The excess 

 of barytes in the filtrate was removed with carbonate of am- 

 monia and free ammonia the filtrate was evaporated over a 

 water-bath to dryness, and ignited until it was free from all 

 ammoniacal salts, then dissolved in water. Some magnesia re- 

 maining insoluble, was filtered off, and the filtrate again evapo- 

 rated to dryness, and ignited, then weighed. It gave 0*770 

 grammes of the chlorides of the alkalies, which is for the en- 

 tire liquid, 2*310 grammes. These alkalies were again dis- 

 solved in a small quantity of water, and the potassa estimated 

 with bi-chloride of platinum, which gave, after being evaporat- 

 ed with alcohol over a water-bath, 2'356 grammes of double 

 chloride of potassium and chloride of platinum (KC1, PtCL. 2 ), 

 or for the entire liquid, 7*068 grammes (KC1, PtCl,). This re- 

 presents 2*157 grammes chloride of potassium (KC1), or 1*326 

 grammes potassa (KO). 



There remains, consequently, after subtracting the chloride 

 of potassium from the chlorides of the alkalies, as follows, the 

 amount of chloride of sodium, which is estimated as loss, thus 

 2-310 KC1, NaCl 2-157, KC1. =0'53 (NaCl), chloride ot 

 sodium. 2*970 grammes of the ash was boiled with distilled 

 water, and filtered. The filtrate was acidulated with nitric 

 acid, then precipitated with nitrate of silver. It gave 0*044 

 grammes of chloride of silver (AgCl), or 0'022 grammes chlo- 

 rine (Cl), also, 0*153 grammes, NaCl, 0-037 grammes, NaCl. 

 = 0-116 grammes chloride of sodium (NaCl), = 0*061 

 grammes soda (NaO). 



1*066 grammes of the ash gave 0*168 grammes carbonic acid 

 (CO*). The following is the per centage of the constituents in 

 LOO parts of the ash. 



