382 Miscellaneous Intelligence 



acts precisely as an acid. It has therefore been called by M. Rose, 

 titanic acid. 



Titanates. When fused with carbonate of potash in excess, two sub- 

 stances arc obtained in the crucible ; the upper is the excess of carbo- 

 nate, the lower the neutral titanate of potash. In neutral titanate thus 

 prepared, the oxygen of the acid is to that of the base as 2 to 1, and 

 as titanic acid was found by calculation from experiments on the sul- 

 phuret of titanum, to contain 33.95 percent, of oxygen, its capacity 

 of saturation was considered consequently as being l6 v Q8. 



These neutral titanates are decomposed by water, which removes 

 part of the potash, and leaves insoluble acid titanates. The acid ti- 

 tanate of soda contained titanic acid 83.15 

 Soda . . 16.85 



100. 

 acted on by muriatic acid, a further portion of soda was removed 

 leaving a salt composed of titanic acid 'jG. 38 

 Soda . . 3.62 



100. 

 The acid titanate of potash gave titanic acid 82.33 

 Potash . . 17-77 



100. 



There are no salts with base of titanic acid ; those compounds which 

 have been taken for such, resulted from the presence of alkali in the 

 titanic acid ; but when the acid titanate of potash is dissolved in mu- 

 riatic acid and diluted, precipitates may be obtained by adding the 

 sulphuric, arsenic, phosphoric, oxalic, and tartaric acids, which are 

 binary compounds of these acids with titanic acid. The compound 

 with sulphuric acid when heated, yields pure titanic acid ; when mo- 

 derately dried, it strongly attracts moisture from the atmosphere. It 

 contains Titanic acid . . 76.67 



Sulphuric acid . 7.67 

 Water .... 15.66 



100.00. 

 The compound with oxalic acid contains 



Titanic acid . . 74.10 

 Oxalic acid . . 10.40 

 Water .... 15.50 



100.00 



Sulphuret of Titanutn. — INI. Rose did not succeed in reducing tita- 

 nium : but by passing the vapour of sulphuret of carbon over it at a 

 very intense heat, succeeded after many trials in forming an uniform 

 and perfect sulphuret. It was of a deep green colour, and on the 



