74 ANALYSES OF THE GRASSES. 



IV. QUACK-GRASS (Triticum repots). 



1. First specimen. Grown in the rear of the Old State House : cut May 1; height 11 



inches. Five whole plants weighed 124 grs., and gave the following percentages : 



Water 79*355 



Dry matter 20-645 



Ash 2-528 



Ash calculated dry 12-245 



Organic matter calculated dry - - - 87-755 S. 



2. Second specimen. From the same place : cut JuneS; height 46-48 inches, just be- 



ginning to head out. Five stalks weighed 361 grs., and gave the following per- 

 centages : 



Water 80-232 



Dry matter 19-768 



Ash 2-081 



Ash calculated dry 10-527 



Organic matter calculated dry - - - 89-473 S. 



3. Third specimen. From the same place : cut June 21 ; height 50 inches, in flower. Two 



stalks weighed 174*20 grs., and gave the percentages following : 



Water 71-618 



Dry matter 28-3S2 



Ash 2-612 



Ash calculated dry 9-203 



Organic matter calculated dry - - - 90-797 S. 



The above shows — excluding the water — a gradual decrease of inorganic, and a 

 corresponding increase of organic matter as the plant advances in age. 



4. Fourth specimen. From the same place : cut May 1: height 11 inches. 100 grains of 



ash gave 



Per centum. 



Carbonic acid ....-- 1-455 



Silicic acid 27 • 150 



Phosphates 17-250 



Lime 0-112 



Magnesia ....... trace. 



Potash 7-350 



Soda 26-785 



Sodium ....... 3-565 



Chlorine 5*425 



Sulphuric acid ...... 4*811 



Organic acids ...... 5-200 



99- 103 S. 



