li II 



OUoLOGICAL SURVEY Of CANADA. 



Analysis of 

 infusorial 

 earth from 

 NewBrunswick 



Economic 

 uses of, 



Kaolin. 



An analysis of the air-dried material gave the following results: 



Silica 80.487 



Alumina 3.146 



Ferric oxide 0.951 



Lime 0.342 



Magnesia 0.283 



Carbonic acid 0.0 1 1 



Phosphoric acid ? 



Potash and soda ? 



Wateri — combined and hygroscopic, and organic matter. . . 13.321 



98.541 



1. — Water and organic matter. 



a. Loss on drying over sulphuric acid 6.535 



b. Loss (in addition to that of a.) on drying at 100° C, in a 



current of pure and dry hydrogen 3.582 



c. Loss (in addition to that of a. and b.) on ignition (and 



after correction for carbonic acid) 3.204 



Total 13.321 



The air-dried material left, on treatment with a boiling solution of 

 caustic potash, 7.994 per cent, insoluble residue of a light reddish-brown 

 colour (after ignition). 



As regards the economic value of this infusorial earth, it may be said 

 to constitute an excellent polishing material ; and although no experi- 

 ments have been made to determine its absorbent power, it may 

 reasonably be expected to prove well adapted for the preparation of 

 dynamite. Again, the extreme facility with which it is dissolved by 

 caustic alkalies (potash or soda), would suggest its advantageous 

 employment for the manufacture of what is commonly known as 

 ''water-glass" or "soluble-glass," a preparation which meets with 

 many important applications in the arts, as for instance, as a cement for 

 the manufacture of artificial stone ; for the hardening and preserving 

 of building stones ; in fixing fresco colours by the process of stereo- 

 chromy; as an addition to soap in the preparation of the so-called 

 "silicated soaps," etc. 



KAOLIN. 



The material here alluded to occurs on a property belonging to Mr. 

 Paul Trottier, situated in Grand Frenier, County of Two Mountains 

 Quebec. 



The locality was visited by Mr. James Eichardson in July, 1879, with 

 the object of ascertaining its precise mode of occurrence, the probable 

 extent of the deposit, and also for the purpose of procuring a sample 

 for examination and analysis. 



