Analyses of Ashes of Plants. 



141 



Analysis of the ash of the bulb : — 







In loo parts. 



Mineral matter removed 

 in an Acre of ("rop. 



Silica 



• 



1*G3 





9-0 lbs.* 









• 



68-8 



Sulpliuric Acid . . 





. 11-26 





61-9 



Carbonic Acid • 



• 



. 9-54 



• 



52-5 







. 11-36 





*'62- 4 



Magnesia . . • • 





. 2-44 





' 13-4 



Peroxide of Iron . 



• 



0-28 





1-5 



Potash 





. 36-16 





198-8 











27-4 



Chloride of Sodium 





9*77 





53-7 



Chloride of Potassium 





none. 





none. 











519-4t 



of the ash of the top 



— 











In 100 parts. 



Mineral matter removed 

 in an Acre of Crop. 



Silica ..... 



• 



4-11 





3 • 1 lbs. 



Phosphoric Acid . 



• 



6-51 





5-0 



Sulphuric Acid • • 





6-50 





4-9 



Carbonic Acid , 





. 6-16 



• 



4-7 











18-2 







. 2' 92 





2-2 



Peroxide of Iron . 





1-90 





1*4 







, 20-36 





15-5 











none. 



Chloride of Sodium . 





. 17-69 





13-4 



Chloride of Potassium 





. 9-77 



• 



7-4 



Total , . . 



• 



. 99-94 





75-8 



Specimen No. 78. — Skirving's Swede. 



From Mr, Arkell. 



{^Soil, stone-brash ; subsoil, ditto ; geological formatio7i, the great oolite. 

 After wheat. Manured for turnips with 6^ cwt. of " animalized ma- 

 nure"! 12 bushels of ashes {?io farm-yard manure). Drilled on 

 the flat at 21 inches, May 30ih, 1846. Appearance of the crop mid- 

 dling : thiji plant. Collected end of November.] 



Produce in bulbs, 7 tuns 1.5 cwt. 

 „ in tops, llj cwt. 



its origin) is not to be looked upon as one of the mineral matters requisite to the well- 

 being of the plant, although it is necessary to take account of its existence in tlie ash. 



In the present case the carbonic acid in both bulb and leaf amounts to 57*2 lbs. on 

 the whole crop of an acre. In other instances, where tlie quantity only of tiie ash is 

 known, a deduction of about 12-0 per cent, on the bulb ash, and 10 0 per cent, on the 

 ash of the top, may be safely assumed as 7iear the proper proportion. 



* We have thought it better to give these quantities in lbs. and tenths of pounds, 

 rather than in pounds and ounces, as in the last report. 



f These numbers are not absolutely the same as those before given — the proportion 

 being only worked out to the nearest tenth. 



% Preparations sold under these names, but of which we do not know the composi- 

 tion. 



