894 



PROCEEDINGS OF SECTION J. 



hydraulicity, with results which I consider highly satisfactory, 

 the lime proving itself of great value for use in damp situa- 

 tions, as well as for general mortar-making purposes." 



In comparing the analysis -of the lime in question with 

 that of other well-known and approved hydraulic limes, I 

 find the following : — 



Analysis of Victorian Limestone hy Mi'. J. Cosmo Nervbery, 

 C.3I.G., cj'C, Government Analyst. 



Carbontite of lime 55 " 02 



„ magnesia 41-37 



„ iron 1-42 



Silica -10 



Soluble salts 1*94 



Moistm'e , '15 



100-00 



No. 1. Bolsover, Derbyshire, 

 „ 2. Middleton, Yorkshire, 

 „ 3. Koach Abbey, ,, 

 ,, 4. Park Nook, „ 



Analysed hy Professors Daniell and W heatstone for the Special 

 Commissioners apyoinied to Report for tlie Buildinf/ of the 

 Houses of Parliament, London. 



The Commissioners mentioned selected these four varieties, 

 and the results have shown that their choice was a judicious 

 one. The similarity of the Victorian limestone to these 

 varieties is very marked. 



The distinction between the mortars made of pure and 

 those made o^ impure carbonates of lime consists in this, that 

 the former have no property which can produce setting with- 

 out the presence of carbonic acid ; that is, practically, without 

 exposure to the air. Mortars made from impure carbonates, 

 on the other hand, contain within themselves to a greater 



