THE AGRICULTURAL GRASSES OF THE UNITED STATES. 139 



albuminoids decrease, while the dry seeds are readilj' 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 ad,ded 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 : 



Ash a n cdyses — qrassei^. 



Name. 



Hierochloa borealis (Vanilla grass) . . 



Eleiisine Indwa (wire grass) 



Eleusine India (wire grass) 



Eleusine India (wire grass) 



JJniola latifoUa (fescue grass) 



Cyuodon dactylon (Bermuda grass). 

 Cynodon dactylon (Bermuda grass) . 



Poa pratensis (Kentucky blue grass)... 



Poa serotiyia (fowl meadow grass) 



Dactylocteniu'i/i Egypt (Egyptian grass) 



Panieum sanguinale (Crab grass) 



Panicum jumentorum (true Guinea 



grass) 



Panicum obtusum 



Panicum virgatum (tall panic grass) . . . 



Panicum 



Panicum Texaaum (Texas mUlet) 



Panicum Crusgalli (barn-yard grass) . . . 

 Panicum filiforme (sleTiieT crab grass). 



Sorghum halapense (Johnson grass) 



Sorghum avenaceum (Indian grass) 



Muhlenbergia diffusa (drop seed) 



Bromus unioloides (Schrader"s grass) . . 



Prornus carinatus (broome grass) 



Agrostis exarata (brown top) 



Paspalum Iceve (water grass) 



Setaria setosa (bristly foxtail) 



Leptoehloa mucroaata (feather grass) . . . 



Tripsacum dactyloides (gama grass) 



Tricuspis seslerioides (tall red top) 



7. 42 



2. 55 



2. 69 



4. 24 



9. 63 



5. 79 



9. 84 



8. 55 



4. 92 



2. 62 



6. 20 



9. 37 



5. 09 



11. 31 



6. 02 



4. 60 





2. 80 



l! 33 



trace 



9. 88 



4. 76 



10. 80 



3. 35 



8. 37 



4. 42 



6.40 



4. 02 



4. 37 



1 2.51 



5.18 



i 6.71 



5. 50 



i 3.56 



4.37 



5.29 



8.48 



! 4. 63 



4.27 



- 3. 69 



6.37 { 



4.84 



10. 44 



2.96 



2.35 ' 



2. 13 



6. 65 ' 



3. 39 



8.79 



5. 61 



9.29 



3. 94 



8.01 : 



1. 93 



6.18 



5. 64 



3, 24 



3. 51 



6. 46 



3.31 



2. 52 



3. 69 



1. 58 



4. 04 



Silica, Si 02. 



Chlorine, CI. 



Calcium ox- 

 ide, Ca 0. 



- C 



r. g 



2 



■ >■> 



1 



;42. 73 



4.49 



3.97 



2.54 



31. 51 



47. 56 



10. 09 



!l0. 27 



4. 10 



10. 27 



24. 61 



6. 71 



^13. 65 



7. 38 



24. 79 



16. 25 



9. 61 



11. 10 



5. 57 



30. 98 



66. 87 



4. 71 



1 7.15 



3. 02 



5. 52 



30. 29 



6. 05 



13. U 



5. 00 



22. 99 



30. 27 



9. 46 



■ 7.99 



2. 96 



22. 89 



27. 36 



11. 03 



i 2.64 



2. 66 



33. 53 



58. 33 



6. 37 



6.76 



1. 83 



13. 93 



64. 62 



15. 65 



2.12 



. 58 





30. 25 



6. 30 



1 4.81 



3. 23 



33. 81 



37. 10 



3. 80 



1 6.70 



2. 92 



31. 71 



34. 17 



6. 76 



20. 67 



6. 91 



21. 20 



30. 93 



6. 04 



1 4.40 



7. 98 



33. 56 



16.51 ! 



7. 77 



10. 18 



14. 16 



35. 93 



48.60 : 



4. 20 



5. 91 



3. 13 



21. 65 



51.17 1 



4. 93 



7.87 



3. 63 



18. 76 



45.10 ■ 



4. 06 



7.39 



7.98 



22. 53 



34 31 I 



6. 55 



7. 39 



4.57 



27.95 



42. 18 : 



11. 48 



7. 23 



5. 52 



13. 26 



40.36 I 



12. 17 



4. 69 



5.18 



12. 98 



22.21 i 



4. 58 



12. 87 



6. 73 



35. 72 



61. 56 



6. 11 



2. 92 



1. 36 



16.84 



39.98 



8. 21 



11. 95 



4. 39 



17. 32 



4. 84 



16. 84 



4. 43 



4. 64 



37. 20 



38.33 



3. 30 



6.19 



2.19 



31. 61 



34.63 



3. 60 



5. 61 



3. 84 



38. 41 



44. 65 



1. 73 



9. 36 



5. 26 



25. 44 



42.59 



3. 81 



2. 31 



1. 56 



39. 33 



55. 92 1 



2. 89 



5. 94 



2. 66 



20. 21 



37. 84 1 



13. 08 



1.64 



1. 07 



29. 06 



37.52 



7. 39 



2.32 



.53 



38. 49 



9. 61 

 12.16 



7. 01 

 15. 70 



6. 95 

 t 2.79 



4. 62 

 3. 86 



12. 00 



13. 41 

 3. 68 

 6. 74 

 6. 78 



16. 38 



1.81 

 6. 30 

 8.13 



.25 

 1.26 



3. 55 



83 



1. 22 

 1. 74 



1. 58 

 .37 



".'si 



"i.'33 

 1.27 



2. 98 



"i.'i2 



2.47 

 .80 

 4. 77 



- 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 Wel- 

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

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

 Puller and myself. It is hoped that the collection and rearrangement 

 of the results will give them an increased value. 



