L. C. Jones — Estimation of Boric Acid. 153 



Analysis of crude borate of lime. 

 Table II. 





Ca borate 



B 2 3 found. 



B 2 3 





taken, grm. 



grm. 



in %. 



(1) 



0-4016 



0-2289 



56-99 



(2) 



0-4044 



0-2302 



56-92 



(3) 



0-4000 



0-2285 



57-11 



Analysis of Colemanite. 







Table III. 







Mineral taken. 



B 2 3 found. 



, #B 2 3 . 





grm. 



grm. 





(1) 



0-4034 



0-2064 



51-15 



(2) 



0-4070 



0-2069 



50-80 



(3) 



0-6004 



0-3054 



50-86 



(*) 



0-6006 



0*3056 



50-89 



<5) 



0-5059 



0-2592 



51-24 



<6) 



0-5092 



0-2592 



50-89 



Average. 

 50'< 



An analysis for boric acid by this process can be completed 

 in five minutes and the results are obviously accurate within 

 the limits of ordinary analysis. 



The usually interfering substances, fluorine, silica, and car- 

 bon dioxide, have no detrimental influence on the results of 

 this process. 



