82 PKOCEEDINGS OP THE AMERICAN ACADEMY 



24 MoO, . P 2 5 . 6 H 2 + 47 aq Mo 24 P 2 71 (HO) 12 + 47 aq 



24 MoO, • P 2 5 . 6 H 2 + 43 aq Mo 24 P 2 71 ( HO) 12 + 43 aq 



24 MoO, . P 2 5 . 6 H 2 + 24 aq Mo 24 P 2 O n ( HO) 12 + 24 aq 



24 Mo0 3 . P 2 5 . 2 K 2 . 4 H 2 Mo 24 P 2 7l (KO) 4 (HO) 8 



24 M0O3 . P 2 5 . CcO . 5 H 2 + 18 aq Mo 24 P 2 O 71 (CcO 2 )(HO) 10 + 18 aq 



48 M0O3 . 2 P 2 5 . 5 (NH 4 ),0 . H 2 + 16 aq Mo 48 P 4 O 148 (NH 4 O) 10 (HO) 2 4- 16 aq 



22 M0O3 • p J°5 • 3 (NH 4 ) 2 . 3 H 2 + 9 aq Mo 22 P 2 G5 (NH 4 0) 6 (HO) 6 + 9 aq 



22 MoO s . P 2 5 . 3 (NH 4 ) 2 . 3 H 2 + 6 aq Mo 22 P 2 65 (NH 4 0) 6 (HO) 6 + 6 aq 



22 M0O3 . P 2 5 . 3 (NH 4 ) 2 Mo 22 P 2 68 (NH 4 0) 6 



22 M0O3 . P 2 5 . 3 K 2 . 3 H 2 + 9 aq Mo 22 P 2 O 65 (KO) (HO) 6 + 9 aq 



22 M0O3 . P 2 5 . 7 Ag 2 + 14 aq Mo 22 P 2 64 ( AgO) 14 + 14 aq 



44 Mo0 3 . 2 P 2 5 . 5 K 2 . H 2 + 21 aq Mo 44 P 4 O 130 (KO) 10 (HO) 2 + 21 aq 



60 M0O3 . 3 P 2 5 . 8 (NH 4 ) 2 . H 2 + 11 aq Mo 60 P 6 O 186 (NH 4 O) 16 (HO) 2 + 11 aq 



18 Mo0 3 . P 2 5 . Na 2 . 5 H 2 + m aq Mo 18 P 2 O 53 (NaO) 2 (HO) 10 + m aq 



18 M0O3 . P.,0 5 . 2 Na 2 . 4 H 2 + n aq Mo ]8 P 2 53 (NaO) 4 (HO) 8 + n aq 

 16 M0O3 . P 2 5 . 3 (NH 4 ) 2 . 3 H 2 + 11 aq Mo 16 P 2 O 47 (NH 4 O) (HO) 6 -f 11 aq 



5 M0O3 . P 2 5 . 3 Na 2 . 3 H 2 + 11 aq Mo 5 P 2 14 (NaO ) 6 ( HO ) 6 + 11 aq 

 5 M0O3 . P 2 5 . 3 (NH 4 ) 2 . 3 H 2 + 4 aq Mo 5 P,0 14 (NH 4 0) 6 (HO) 6 + 4 aq 

 5 M0O3 . P.,0 5 . 3 K 2 . 3 H 2 + 4 aq Mo 5 P 2 14 (KO) 6 (HO) 6 -f 4 aq 



5 M0O3 . P 2 5 . 3 Ag 2 . 3 H 2 + 4 aq Mo 5 P 2 14 (AgO) 6 (HO) 6 + 4 aq 



10 M0O3 . 2 P 2 5 . 5 K 2 . HoO + 19 aq Mo 10 P 4 O 34 (KO) 10 (HO) 2 + 19 aq 

 10 Mo0 3 . 2 P 2 5 . 5 (NH 4 ) 2 6 . H 2 + 6 aq Mo 10 P 4 O 34 (NH 4 O) 10 (HO) 2 + 6 aq 



20 M0O3 . As 2 5 . 6 H 2 + 21 aq Mo 20 As 2 O 59 (HO) 12 + 21 aq 



20 M0O3 . As 2 5 . 3 K 2 Mo 20 As 2 O 62 (KO) 6 



20 Mo0 3 . As 2 5 . 3 (NH 4 ) 2 Mo 20 As 2 O 62 (NH 4 O) 6 



16 Mo0 3 . As 2 5 . 5 (NH 4 ) 2 . H 2 + 8 aq Mo 16 As 2 O 47 (NH 4 O) 10 (HO) 2 + 8 aq 



7 M0O3 . As. 2 5 . 6 H 2 + 8 aq Mo 7 As 2 O 20 (HO) 12 + 8 aq 



7 Mo0 3 . As 2 5 . (NH 4 ) 2 . 5 H 2 Mo 7 As 2 O 20 (NH 4 6) 2 (HO) 10 



7 M0O3 . As 2 5 . 3 BaO Mo 7 As 2 23 ( Ba0 2 ) 8 



7 Mo0 3 . As 2 5 . 3 Ag 2 Mo 7 As 2 28 (AgO) 6 



6 M0O3 . As 2 5 . 6 H 2 + 10 aq Mo 6 As 2 17 (HO) 12 + 10 aq 

 6 M0O3 . As 2 5 . 4 (NH 4 ) 2 + aq Mo 6 As 2 O l9 (NH 4 0) 8 



6 M0O3 . As 2 5 . (NH 4 ) 2 . 2 H 2 + 2 aq Mo 6 As 2 O 20 (NH 4 O) 2 (HO) 4 + 2 aq 

 6 M0O3 . As 2 5 . Na 2 . 5 H 2 + 7 aq Mo 6 As 2 O 17 (NaO) 2 (HO) 10 + 7 aq 



For the convenience of comparison with the corresponding com- 

 pounds of tungsten, I have in writing these formulas as far as possible 

 assumed that all the phospho-molybdic and arsenio-molybdic acids con- 

 tain 12 atoms of hyclroxyl, or, in the language appropriate to the old 

 notation, are six-basic. With the material before us, we are now pre- 

 pared to discuss the question of the basicity of the phospho-tungstates 



