CONTENTS. ' 111 



Page 



5. On the increase of elasticity which obtains, when steam removed from 

 contact with its generating water is heated, 165 



6. On the use of Steatite or Soapstone for diminishing Friction in Ma- 

 chinery. By Mr E. Bailey, Boston, 166 



7. Anemoscope for ascertaining the Direction of Slight Winds. By Mr 



B. M. Foster, 167 



8. Notice of a Pyrometer for measuring high Temperatures. By James 

 Prinsep, Esq. Benares. 168 



9. Method of making Ultramarine, discovered by M. Tunel, 169 



XXVII. SCIENTIFIC INTELLIGENCE, ib. 



I. NATURAL PHILOSOPHY. 



Astronomy — 1. Spots on the Sun. 2. M. Damoiseau on Encke's periodi- 

 cal comet, ib. 

 Optics — 3. Large Achromatic Telescope by Lerebours, 170 

 Meteorology — 4. Mean temperature of Penzance, deduced from Twenty- 

 one years' Observation. 5. Dr Heineken on the Mean Temperature of Fun - 

 chal, &c. 6. Water-spouts in the Indian Ocean. 7. Meteoric Stone which 

 fell in India on the 27th February, 1827. 8. Meteoric Stones which fell near 

 Belostok in Russia. 9. Vibration of Glass Vessels indicative of approaching 

 Storms. 10. On Terrestial Radiation, 170—172 

 Aeronautics.-— 11. On the origin of Air Balloons, 173 

 Magnetism — 12. Professor llansteen's Magnetic Journey to Siberia, ■ ib. 



II. chemistry. 

 13. Expansion of crystallized bodies by heat. 14. Analysis of the Honeystone, 

 or Mellite. 15. Analysis of some varieties of Serpentine. By Mr Lfch- 

 nell, in Stockholm. 16. Analysis of Glauber Salts. 17. Cadmium. 18. Ana- 

 lysis of Mica, Chlorite, and Talc, with one Axis of Double Refraction. By 

 Professor Von Korell. 19. Professor Erdmann's New Chemical Jour- 

 nal. 20. On a new method of preparing Chromic Acid. By M. Arnold 

 Maus. 21. On the detection of potash by the blowpipe, by means of the 

 oxide of Nickel. By M. E. Harkort. 22. On Aluminium and some of its 

 Compounds. By Dr Wohler. 23. Chloride of Aluminium. 24. Metallic 

 Aluminium, 173 178 



III. NATURAL HISTORY. 



Mineralogy — 25. Datholite or Prismatic Dystome Spar. 26. Protherite. 

 27. Diatomous Schiller Spar, 179 180 



XXVIII. List of Patents granted in Scotland since March 10, 1828, 181 

 XXIX. Celestial Phenomena, from July 1st to October 1st 1828, 182 



XXX. Summary of Meteorological Observations made at Kendal in Decem- 

 ber 1827, and in January, February, March, April, and May, 1828. 

 By Mr Samuel Marshall, 183 



XXXI. Abstract of the Register of the Thermometer, Barometer, and Rain- 

 Gage for the years 1826 and 1827, kept at Canaan Cottage. By 

 Alexander Adie, Esq. F. R. S. Edin. 187 



XXXII. Register of the Barometer, Thermometer, and Rain-Gage, kept at 

 Canaan Cottage. By Alexander Adie, Esq. F. R. S. Edin. 188 



