92 



ANALYSIS OF SOILS. 



that when phofphate or fulphate of lime are difcovered by tho 

 independent procefs XIII. a correction muft be made for the 

 general procefs, by fubtracting a fum equal to their weight 

 from the quantity of carbonate of lime, obtained by precipi- 

 tation from the muriatic acid. 



In arranging the produd:?, the form mould be in the order 

 of the experiments by which they were obtained. 



Thus 400 grains of a good filicious fandy foil may be fup- 

 pofed to contain 



125 



Amount of all the produces 395 



Lofs m - - 5, 



In this inftance the lofs is fuppofed fmall ; but in general, in 

 actual experiments, it will be found much greater, in con- 

 fequence of the difficulty of collecting the whole quantities of 

 the different precipitates; and when it is within thirty for 

 four hundred grains, there is no reafon to fufpect any want of 

 due precifion in the procefles. 



XV. This general Method of Analyfis may in many Cafes 

 be much jlmptifted. 



Simplification, When the experimenter is become acquainted with the ufe 

 &c. of the f ij ie different inftruments, the properties of the reagents, 



and 



