Analyses of Ashes of Plants, 181 



Table 7. — Mineral Matter (in pounds) in one ton of Turnip-tops. 



No. of Spec. 



82 



83 



84 



S5 



77 



86 



Meyn 

 of the six 

 Specimens. 



Variely. 



Skirving's Skirving's 

 Swede, ; Swede. 



Dale's 

 Hybrid. 



Dale"s 

 Hybrid. 



Skirving's 

 Swede. 



Green-top 

 White. 



Per Centagel 

 of Ash . 1 



1-97 



1'95 



1-19 



2-25 



1-61 



1-82 





Silica • 

 Phosph. Ac. 

 Sulpb.Ac. . 

 Lime . , 

 Magnesia . 

 Perox. Iron 

 Potash . . 

 Soda . . 

 Chlo. Sodium 

 Chlo. Potass. 



Total . 



3- 55 

 2-15 



4- 57 

 12-57 



1-16 

 1-33 



5- 09 

 5-49 

 5-48 



•50 

 2-71 

 5-33 

 13-26 

 1-39 



•29 

 9-08 



4*51 

 •91 



-34 

 1-22 

 1-79 

 9-37 

 •47 

 •16 



3- 01 

 1-23 



4- 81 



3-69 

 5-87 

 3-51 

 12-18 

 1-79 

 1-55 

 6'20 



11*40 

 -92 



1- 48 



2- 36 

 2-34 

 8-64 

 1-05 



-68 

 7-34 



6-37 

 3^53 



•85 

 1-29 

 3-20 

 11-76 

 M7 



-33 



5- 18 



4*36 



6- 77 



1- 73 

 2*60 

 3*46 



11-29 

 M6 

 •72 

 6-08 

 M2 

 6-15 



2- 02 



41-39 j 38-06 



i 



23-00 



47'11 



33-79 



34-91 



36-33 



From the table it will be seen that Specimen 84, which gave an 

 ash with rather little phosphoric acid, does yet, on account of its 

 large amount of ash, contain more of this acid^ when calculated 

 on the turnip itself, than several other specimens. Again, the 

 ash of Specimen 86 was found by analysis to contain much more 

 potash than the other specimens. Calculated, however, in its 

 proportion to the vegetable matter, the potash is brought down to 

 the usual average. 



It will be at once noticed that in a ton of one bulb there may 

 be almost twice as much mineral matter as in another, and the 

 same is equally true of the leaf; but it is very singular that if a 

 calculation be made of the mineral matter in the entire crop — 

 that is^ in its relative proportions of root and top — much of the 

 discrepancy will disappear. 



The following table is calculated so as to exhibit the mineral 

 matter removed by one ton of the whole plant (bulbs and tops), 

 in the proportion of those parts actually ascertained in our experi- 

 ments. It would seem more scientific to make these calculations 

 upon a decimal quantity of the vegetable substance, such as 

 lOjOOO or 100,000 grains, but it is conceived that by referring 

 the mineral matter to a ton of the crop, a double purpose is 

 served : the relation is sufficiently apparent, and numbers of prac- 

 tical application are obtained : — 



