22a Dr. Brewster on the laws of polarisation, &c. 
Epidbte 
io Kyariite 
Talc 
Prehnite 
Dichroite 
Lepidolite 
1 5 Mother of pearl 
Indurated talc 
Sulphate of lime 
barytes 
— strontian 
20 — — — lead 
- — — — — - magnesia 
iron 
- — copper 
— copper and iron 
25 ■ — — ammonia 
— potash 
— — - — ■ — — soda 
— zinc 
— — — — — cobalt 
30 — ammonia and magnesia 
— — soda and magnesia 
— — - — hickel 
— — — manganese 
Carbonate of lead 
35 ■ — soda 
• — — ammonia 
— potash 
Nitrate of silver 
— - — ammonia 
40 potash 
bismuth 
mercury 
— zinc 
4.5 — — — strontian 
Nitrate of copper 
Borax of the shops 
Tartaric acid 
Citric acid 
50 Hyper oxymuriate of potash 
Phosphate of soda 
Prussiate of potash 
Tartrate of potash and soda 
Oxalate of ammonia 
55 Super-oxalate of potash 
Crystallized Cheltenham salts 
Rhomboidal salt 
Murio*sulphate of magnesia and iron 
Benzoate of ammonia 
60 Mesotype 
Oxalic acid 
Chromic acid 
Muriate of barytes 
— — . mercury 
65 magnesia 
— — copper 
Sulphur 
Hydrate of barytes 
Super-tartrate of potash 
70 Tartrate of potash 
potash and antimony 
Boracic acid 
Succinic acid 
Chromate of lead 
75 Diallage 
Spodumene 
Tincal or native borax 
Anhydrite 
Sugar 
80 Acetate of lead 
copper 
