The Neglect of Chemistry hy Practical Farmers. AAl 



Table II. — continued. 



Name. 



Atomic Composition. 



Atomic 

 Weight. 



1 



Composition per c"nt. 







40 





, , chloride . 



1- pot. + 1 chl. 



76 



.53 pot. + 47 ox. 



Silica, or silicic acid . . 



1 silicurn + 1 ox. 



16 



50" sil. + .50. ox. 







8 





Soda 



1" sodium -\- 1 ox. 



32 



75* sod. + 2.5 ox. 



, , carbonate . 



1* s. + 1' c. a. 



54 



59 s. -f 41 c. a. 



, , do., crystallized 

 , , hydrate .... 



(1 s. + 1* c. a.) -j- 10 w. 



144 



22- s. + 16- c. a, + 62 w. 



1- s. + 1 w. 



41 



78 s. + 22 w. 



, , muriate . . . 



1* s. + 1 m. a. 



69 



46 s. + 54 m. a. 



, , Bitrate . . • • 



1' s. -j- 1 n. a. 



86 



37 s. + 63 n. a. 



, , sesqui carbonate 



(l^s. + ]• c. a.) + 2 w. 



88 



55 s. + 25 c. a. + 20 vr. 



, , sulphate 



1" s. + r s. a. 



72 



44 s. + 56 s. a. 



, , do., crystallized 



(1* s. + 1- s. a.)+ 10 w. 



162 



20 s. + 25 s. a. + 55 w. 







24 





, , chloride 



V sod. + 1 chl. 



60 



40 sod. + 60 chl. 



36 c. + 30 h. + 30 ox. 



486 



44 c. + 7 h. + 49 ox. 



Sugar 



36 c. + 36 h. + 36 ox. 



.540 



40 c. + 7 h. + 53 ox. 





16 







1 ox. + 1- h. 



9 



88 ox. + 12 h. 





? 



? 



81- c. + 11- h. + 8 ox. 



Note.~l believe there is some doubt with respect to the atomic composition of organic 

 compounds. The numbers in the composition per cent, express the quantity of each 

 ultimate element contained in 100 parts of the substance, and not the number of atoms. 



Examples to Table Q. — One or two examples will be sufficient 

 to sliow the method of using this table. 



Suppose, for instance, it was required to ascertain the respective 

 amounts of potash and sulphuric acid in 73 lbs. of sulphate of 

 potash. 



Now in 88 parts of this salt there are 48 parts of potash and 

 40 of sulphuric acid (see their respective weights as given in the 

 table) ; if therefore we multiply 73, the given quantity of the 

 salt, by 40, and divide by 88, it will give the amount of sulphuric 

 acid contained in it, and multiplying by 48, and dividing by 88, 

 the amount of potash — ■ 



T"n„o ^--^ \/ Q".o f the amount of sulphuric acid contained in the 73 lbs. 



38 [ 01 sulphate oi potash ; 



and 73 X — = 39*8 J amount of potash contained in the 73 lbs. of sul- 

 88 \ phate of potash. 



73-0. Amount of sulphate of potash. 



Or by decimals, by referring to the head. Composition per Cent., 

 of the Table, we find that there are 55 parts of potash and 45 

 parts of sulphuric acid in 100 parts of sulphate of potash ; if, 

 therefore, we multiply 73, the given quantity of salt, by this 



VOL. XIII. 2 II 



