216 



MEMOIll OF DE. DALTON, AND 



CHAPTER X. 



FISCHER, BERTHOLLET, PROUST, &C. 



When Richter had illustrated the action of neutral salts, 

 and had seen somewhat dimly reciprocal proportion, Fischer 

 (Ernst Gottfried) saw it in a much clearer light, and put it 

 in a more practical form. He took Richter's analyses, and 

 shewed that a constant quantity of one base would unite to 

 a constant quantity of an acid, and that the numbers in all 

 would be reciprocal. Such, one would call the true discovery 

 of reciprocal proportion, were it not, that in this case, the 

 intellectual labour required does not seem great. 

 Fischer's table is as follows : — 



ACIDS. 



427 Fluoric. 



677 Carbonic. 



706 Sebacic 



712 Muriatic. 



755 Oxalic. 



979 Phosphoric. 



988 Formic. 



1000 Sulphuric. 



1209 Succinic. 



1405 Nitric. 



1480 Acetic. 



1583 Citric. 



1694 Tartaric* 



It is explained so ; *' When any substance is taken from 

 one of the two columns, ex, gr., potash from the first column, 

 where the number 1605 stands, then every number of the 

 second column shews how much of that substance is needed 

 to neutralize 1605 of potash." The same thing may be said 



* Schweigger's Stoechiometrische J^cihen. Page 45. 



Alumina 525 



Magnesia 615 



Ammonium 672 



Lime 793 



Soda 859 



Strontian 1329 



Potash 1606 



Baryta 2222 



