│ │ │ 1·976. │ which is │ │ │ │ _Surface_, │ _Quick-lime_. │ │ │ │ studded with │ │ │ │ │ tubercles. │ │ │ ├───────────────┼─────────────────┼─────────────────┼─────────────────┤ │3. BONE EARTH. │_Colour_, pale │Principally │ │ │ │ brown or gray; │ _Phosphate of │ │ │ │ _surface_ │ Lime_. It is │ │ │ │ smooth and │ soluble in │ │ │ │ polished; │ muriatic acid. │ │ │ │ _structure_, │ │ │ │ │ regularly │ │ │ │ │ laminated; the │ │ │ │ │ laminæ easily │ │ │ │ │ separating into│ │ │ │ │ concrete │ │ │ │ │ crusts. │ │ │ ├───────────────┼─────────────────┼─────────────────┼─────────────────┤ │4. TRIPLE. │_Colour_, │It is an │This species │ │ │ generally │ _Ammoniaco- │ attains a │ │ │ brilliant │ magnesian │ larger size │ │ │ white; │ phosphate_, │ than any of the│ │ │ _surface_ │ generally mixed│ others. │ │ │ uneven, studded│ with phosphate │ │ │ │ with shining │ of lime; pure │ │ │ │ crystals; less │ alkalies │ │ │ │ compact than │ decompose it, │ │ │ │ the preceding │ extricating its│ │ │ │ species; │ ammonia. │ │ │ │ between its │ │ │ │ │ laminæ, small │ │ │ │ │ cells occur, │ │ │ │ │ filled with │ │ │ │ │ sparkling │ │ │ │ │ particles. │ │ │ ├───────────────┼─────────────────┼─────────────────┼─────────────────┤ │5. FUSIBLE. │_Colour_, │A compound of the│It is very │ │ │ greyish-white. │ two foregoing │ fusible, │ │ │ │ species. │ melting into a │ │ │ │ │ vitreous │ │ │ │ │ globule. │