16 



BULLETIN 160, U. S. DEPARTMENT OF AGRICULTURE. 



The chemical analyses of these plants, taken from Bulletin No. 

 60 of the New Mexico Agricultural Experiment Station, 1 are as 

 follows : 



Table XVII. — Chemical analysis of Platopuntia Undheimeris 





Green. 



Air dry. 





7515 



7516 



7567 



7515 



7516 









Spines 



Per cent. 



0.10 



87.36 



2.82 



.60 



.26 



7.54 



1.42 



9.82 



Per cent. 



Per cent. 



0.42 



84.82 



2.27 



.96 



.30 



9.84 



1.81 



12.91 



Per cent. 

 0.72 

 5.65 

 21.05 

 4.49 

 1.95 

 56.26 

 10.50 

 73.30 



Per cenj,. 



Per cent. 

 2.60 



Water 



79.88 

 4.98 

 .45 

 .20 

 9.55 

 4.94 

 15.14 



5.20 

 23.45 



2.12 



.95 



44.98 



23.30 



71.35 



Ash 



13.95 



5.92. 



1.82 



60.61 



11 15 



Crude protein 



Crude fat 



Nitrogen free extract 



Crude fiber 



Organic matter 



79.50 





ANALYSIS OF THE ASH. 



[Sample No. 7515.] 



Carbon per cent. . 0. 14 



Sand do 29 



Per cent in pure a -h: 



Soluble silica (SiO) 43 



Iron ( Fe) ! 20 



Aluminum ( Al) 00 



Manganese (Mg) 49 



Potassium ( K) 14. 22 



Sodium (Na) 35 



Phosphoric acid radicle ( P0 4 ) 1. 11 



Sulphuric acid radicle (SO*) 1. 15 



Chlorine 2. 15 



Carbonic acid radicle (C0 3 ) 49. 12 



Table XVIII. — Chemical analysis of Platopuntia engelmannii. 





Green. 



Air dry. 



Sample No 



65621 



6575 



7810 



78411 



65621 



6575 



7810 



78411 





P.ct. 



P.ct. 



0.32 



91.07 



2.00 



.32 



.12 



4.95 



1.54 



6.93 



P.ct. 



0.04 



89.41 



1.60 



.35 



.23 



7.21 



1.20 



8.99 



P.ct. 



P.ct. 



P.ct. 



3-33 



7.33 



20.80 



3.29 



1.20 



51.43 



15.95 



71.87 



P. ct. 

 0.33 

 6.83 

 14.05 

 3.07 

 2.00 

 63.48 

 10.57 

 79.12 



P.ct. 



Water 



Ash 



89.09 



.91 



.48 



.33 



7.31 



1.88 



10.00 



85.41 

 .77 

 .46 

 .33 



10.03 

 3.00 



13.82 



6.20 

 7.80 

 4.16 

 2.85 

 62.84 

 16.15 

 86.00 



3.97 

 5.07 





3.06 



Crude fat 



2.20 



Nitrogen free extract 



72.58 



Crude fiber 



13.12 



Organic matter 



90.96 



Table XIX. — Chemical analysis of Platopuntia tuna. 





Green. 



Air dry. 



Sample No 



7519 



7577 



7519 



—n- 







Spines 



Per cent. 



0.36 



81.86 



4.29 



1.32 



.28 



8.88 



4.07 



14.55 



Per cent. 



Per cent. 



1.82 



5.18 



21. 65 



6.68 



1.40 



44.56 



20.53 



73. 17 



Per cent. 



Water 



92.25 

 1.75 

 .63 

 .16 

 4.02 

 1.19 

 6.00 



8.12 



Ash 



20.80 



Crude protein 



7.53 



Crude fat 



1.85 



Nitrogen free extract 



47.60 



Crude fiber 



14.10 



Organic matter 



71.08 









1 Griffiths, David, and Hare, R. F. Prickly pear and other cacti as food for stock, II. 

 X. Mex. Agr. Expt. Sta. Bui. 60, 134 p., 7 pi., November, 1906. 



