Mr. Waldo Lincoln employed this process in making an 

 tialysis of bone earth, and permits me to cite his results. "The 

 itro-mercnrous phosphate was ignited with cupric oxide. 



Wt. taken -5586 -4812 •'7025 -6969 



" Si02 found -0009 -0007 ' 



" P2O5 " -2367 -1487 -2421 -2396 



Per cent SiOg 0-16 0-16 



" P0O5 42-37 34-48 34-46 34-38 



Mean of P^O^ in three analyses, 34-44 



The first analysis presents another instance of failure on 

 "' ' '■ ' ■ being properly mixed with the 



Aluminic phosphate. — This was prepared by adding an excess 

 of disodic phosphate to a solution of potash alum. The precip- 

 itate thus obtained was carefully washed and dried. The phos- 

 phate was dissolved in the least possible quantity of nitric acid 

 and then treated as in the previous cases. An excess of nitric 

 acid must be carefully avoided. The precipitate was ignited 

 with cupric oxide. 



determine the c 'iii|M.->ii 

 found with the <-il. p|,;-, 

 by simple ignition. 



(1) -SCWI) -nus. g:i 



(2) -8370 " 



(Al203)2(P20,)-|-8ll20 



or Al203-hAl2P208-l-8ll20 

 > be a basic aluminic phosphate. 



P.,0. 



2o, 



