CONTENTS. : lil” 
Am i aaa PAGE 
of Crystalline Forms of the same Substance. 4. Supposed Effect of 
~ Magnetism on Crystallization. 4. Thermo-magnetisu. 5. Electro-— 
maguetic Multipliers. 6. Plate Electrical Machines. 7. Improve- 
ment of the Leyden Jar. §. Electricity on Separation of Parts. 9. 
Electric Light. 10, Connexion of Phosphorescence with Electricity. 
11. Phosphoresence of Acetate of Lime. 12. Preparation of Sul- 
phurons Acid Gas. 13. Preparation of Sulpburetted Hydrogen. 14. 
Preparation of Saturated Hydro-sulphuret of Potash or Soda, 15. 
Preparation of Kermes Mineral. 16. Action of Sulphate on Iron. 
17. Economical Preparation of pure Oxide of Nickel. 18. White 
Copper. 19. Prussian Blac. 20, Crystallization’ of the Sub-car~ 
bonate of Potash. 21. Composition of Ancient Ruby Glass. 22. De- 
tection of Arsenic in cases of Poisoning. 23. Ou the Detection of 
Acetate Morphia in cases of Poisoning. 24. Test for Morphia. 25. 
Process for obtaining Strychnia. 26. Volatility of Salts of Strychnia. 
27. Acid Tartaric Sulphate of Potash. 28. Pyroligneous Ether, or 
Pyroxilic Spirit. 29. Cafeine. 30. Conversion of Gailic Acid into 
Ulin, 31. An Aécount of an Electrical Arrangement produced 
with different Charcoals, and one conducting Fluid. . i ‘ . 158 
Ill. Narurat Hisrory. 
1. Vegetation at different Heights. 2. Irritability of Plants. 3. 
Notice of an undescribed Lava which attacks and devours Snails. 4. 
Hatching Fish. 5. Natural changes in Carrara Marble. 6. Note 
on the existenee of a Nitrate anda Salt of Potash in Cheltenham 
Water. 7. [odine in Mineral Waters, &c. $8. New Vesuvian Mine- 
rals. 9. Products of combustion of certain Coal Strata. 10. Ad- 
vancement of the Ground. 11. Existence of Free Muriatic Acid in 
the Stomach, 12. Usé of Sulphate of Copperin Croup. .  . Wa 
On the Recurrence of the Smallest Light of the Variable Star Algol, 
By W. M, Moseley, Esq. p Puke ‘ ' * oe 184 
XV. Meterologieal Diary beet Aten Re ed) Gerrg «AQT 
