THE NATURALIST, 1913. PLATE IX. 
No. 3.—Top bed, Liverton Ironstone. 
Oolitic grains ; insoluble portion left on boiling with strong Hydrochloric acid. 
Magnified 30 diameters. 
No. 4.—Top bed, Liverton Ironstone. 
Same as No. 3, after crushing. Note the grain at right hand lower corner in 
which the Oolitic layer has fallen off, leaving a second layer ¢ xposed. 
Magnified 30 diameters. 
