the Attractive Powers of Mineral Acids. 5 3 
The refult of thefe experiments was, that 100 grs. of each, 
of thefe acids take up, at the point of faturation of each me- 
tallic fubftance, dephlogifticated to Inch a degree as is neceflary 
for its folution in each acid, the quantities ex prefled in tlie fol- 
lowing table, which denote their degree of affinity to each 
metal. 
Table of the affinity of the three mineral acids to metallic 
fubjlances . 
100 gra. 
Iron. 
Cop- 
per. 
Tin. 
Lead. 
Silver 
Mer- 
cury. 
Zinc. 
Wit'- 
muth. 
Nickel 
Co- 
balt. 
Reg. 01 
antimo. 
!\C£. Ol 
arfenic. 
Vitriolic acid 
27O 
260 
Oo 
00 
412 
390 
432 
3 l8 
25O 
310 
320 
360 
200 
260 
Nitrous acid 
2 55 
2 55 
I 20 
3 6 5 
375 
416 
3°4 
290 
3 °o 
350 
194 
220 
Marine acid 
265 
265 
130 
400 
420 
00 
'd- 
3 1 - 
25O 
320 
275 
3 ,0 i 
570 
I98 j 29O 
let I cannot fay that thefe numbers are precifely fuch as 1 
could extradl from my observations on the colour of the folution 
of litmus; for thefe indications are fo precarious that I did not 
abfolutely confide in them, but adj ufted the numbers, as I 
thought other phenomena required. However, the deviations 
were not fo considerable as to induce a doubt that metallic earths 
had not almoft all a Stronger affinity to the three acids than 
even fixed alkalies. Neverthelefs, the common tables, which 
poStpone metallic fubStances to all others,, are in reality juft ; 
they only require a different denomination, being in ftift tables 
of precipitation rather than of affinity , as fir as they relate to 
metallic fubStances, exprefling by their order,, what metallic 
fubStances precipitate others from the different acids. But thefe 
precipitations are constantly the refult of a double affinity and 
decompofttion, 
