392 G. F. Barker on normal and derived Acids. 
aF Oy i O, and it may be viewed as di-meta-phosphoric acid 
aaa O, in the radical of which H, has replaced 0. In 
phosphorous acid H,PO,, a single atom of hydrogen being 
united directly to the phosphorus, the other two are re- 
placeable by basic metals, yielding acid and neutral. salts, 
having the formulas“HEO) O, and CP Oo O, as Ram- 
melsberg has shown. All three hydrogen atoms may be re- 
placed by the alcoholic radicals, forming neutral ethers ; but 
only two atoms of this radical—those which have replaced the 
basic hydrogen—can be exchanged for a metal, to form salts, 
The third atom, replacing as it does, the alcoholic hydrogen, 
is still retained, forming alcoholic phosphorous acids, The con- 
stitution of these acids may be graphically represented thus: 
Phosphoric acid. Phosphorous acid. Hypophosphorous acid. 
0 oO i 
| {| : 
HO—P—OH HO—P—OH i 
| | 
o) H 
S H 
pytargyrite), argentic mono-meta-sulphantimonite AgSbS, 
ite) and mono-meta-antimonous acid HSbO, ; ortho- 
Ortho-carbonous acid H,Co, carbonic HyCOs 
: H,CO; 
See eee 
