THE AGRICULTURAL GRASSES OF THE UNITED STATES. 139 



albuminoids decrease, while the dry seeds are readily detached from 

 their glumes and lost with their store of nitrogen. 



For different species, however, different times are undoubtedly suit- 

 able, and experience must be added to our chemical knowledge to enable 

 a rational decision to be arrived at. 



THE COMPOSITION OF THE ASH. 



The ash of many foreign varieties of grasses have been analyzed and 

 the results collected and published by Wolff. Of American growth the 

 ash of only a number of the wild grasses collected in 1878 have been 

 examined. The results are here given: 



A.sh analyses — qrasaea. 



Name. 



42 



2.55 



42.73 



69 



4.24 



47.56 : 



6^ 



5.79 



24.61 



84 



6.55 



16. 25 



92 



2.62 



66.87 



20 



9.37 



30.29 



09 



11.31 



30. 27 



02 



4.60 



27.36 : 



97 



2.80 



58. 33 



33 



trace 



64.62 : 



68 



4.76 



30.25 



80 



3.35 



37.10 



37 



4.42 



34.17 



40 



4.02 



30.93 



Hierochloa borealis ( Vanilia grass) 7. 



Eleu^ine Indica (wire grass) 2. 



Eleusine India ( wire grass) 9. 



Eleruine India ( wire grass) 9. 



JJniola latifolia < fescue grass) 4. 



Cynodon dattylon ( Bermuda grass) 6. 



Cynodon dactylon ( Bermuda grass) 5. 



Sporohcilus Indicus i smut grass) 6. 



Andropojon Tirg. (broom grass) 2. 



Andropogon scoparius 1. 



Port prate asis ( Kentucky blue grass) 9. 



Port serotina (fowl meadow grass) 10. 



Dacti/locteniuin Egypt CEgx-ptisLTi^rass) . 8. 



Panicum sanguinale (Crab grass) 6. 



Panicum jumentorum (true Guinea | 



grass) 4. 37 i 2. 51 16.51 



Panicum obtusum 5.18 ; 6.71 48.60 



Panicum virgatum (tall panic grass) 5. 50 j 3. 56 51. 17 



Panicum 4. 37 | 5. 29 45. 10 



Panicum Texanvm (Texas millet) 8. 48 4. 63 34 31 



Panicum Cruigalli (barn-yard grass) 4. 27 ' 3. 69 42. 18 



Panicu?/? nZi/or?/!^ (slender crab grass).. 6.37 I 4.84 40.36 



Sorghum halapeiue (Johnson grass) 10. 44 ; 2. 96 22. 21 



(So r^/i u w a r€/iacfU//M Indian grass) 2. 35 2. 13 61.56 



MuhUnbergia dijrusa {drop seed) 6. 65 3. 39 39.98 



Bromus unioloides (Schrader's grass) 8. 79 ■ 5. 61 4. 84 



Bromiig carinatus (broome grass) 9. 29 3. 94 38. 33 



J. grrosf i« eiarafrt (brown top* 8. 01 1. 93 34.63 



Pagpalum Z^sre (water grass) 6.18 5.64 44.65 



Setaria setosa (bristly foxtail) 3. 24 3. 51 42. 59 



Leptoehloa mucronata (feather grass i 6. 46 3. 31 



Tripgacum dactyloides (gama grass> 2.52 ■ 3.69 



Tricugpis seslerioides (tall red top; 1. 58 4. 04 



55. 92 

 37.84 

 37.52 



4.49 



10.09 



6.71 



9.61 



4.71 



6.05 



9.46 



11.03 



.37 



15.65 



6.30 



3.80 



6.76 



6.04 



4.20 

 4.93 

 4.06 

 6. 55 



11.48 



12.17 

 4. 58 

 6.11 

 8.21 



16.84 

 3.30 

 3.60 

 1.73 

 3.81 

 2.89 



13.08 

 7.39 



10. 27 



13.65 



11.10 



7.15 



13.44 



7.99 



2.64 



6.76 



2.12 



4.81 



6.70 



20.67 



i 4.40 



10.18 

 5.91 



7.87 



7.23 

 4.69 



12.87 

 2.92 



11.95 

 4.43 

 6.19 

 5.61 

 9.36 

 2.31 

 5.94 

 1.64 

 2.32 



-I ^ I i^ ^ 



2.54 31.51 ; 4.54 1 25 



4.10 10.27 9.52 1.26 



7. 38 24. 79 7. 39 



5. 57 30. 98 4. 55 3. 55 



3. 02 5. 52 

 5.00 22.99 



2.96 22.89 9.61 42 



2.66 33.53 

 1.83 13.93 



.58 



3.23 33.81 



2.92 31.71 2.79 83 



6.91 21.20 

 7.98 33.56 



14. 16 35. 93 8. 57 



3.13 21.65 4.62 



3.63 18.76 3.36 1.22 



7.98 22.53 1.54 1.74 



4.57 27.95 4.54 1.58 



5.52 13.26 12.00 .37 



5.18 12.98 13.41 



3 35.72 3.68 81 



16. 84 6. 74 



17.32 6.78 1.33 



37.20 16.38 1.27 



31.61 2. 17 2.98 



3& 41 3. 97 



25.44 60 1.12 



39.33 1.18 2.47 



20.21 1.81 80 



29.06 6.30 4.77 



38. 49 8. 13 



4.55 

 5.19 





6 66 





9.61 

 12.16 



7.01 

 15.70 









6 95 





2.79 

 7.50 

 6.67 





1.36 



4.39 



4.64 



2.19 



3.84 



5.26 



1.56 



2.66 



1.07 



.53 



CONCLUSION, 



The work which has been collected in the previous pages extended 

 over several years, from 1878 to 1883. It was inaugurated by Dr. Peter 

 Collier, as chemist to this Department, and the laboratory work for the 

 first year was in the hands of Mr. Henry B. Parsons, Mr. Charles VTel- 

 lington, and myself. The remainder of the work has been under my 

 own supervision, and has been almost entirely carried out by Mr. Miles 

 Fuller and myself. It is lioped that the collection and rearrangement 

 of the results will give them an increased value. 



