VI CONTENTS. 



XIV. Astronomical and Nautical Collections, No. XXII. 



i. Further Examination of Captain Thomson's Tables. By a 

 Correspondent 281 



ii. Tables of Third and Fourth Differences, for interpolating the 

 Moon's Place. By Thomas Henderson, Esq. .... 287 



iii. Corrections of the Catalogue of Zodiacal Stars inserted in the 

 Third Number of the Astronomical Collections. By Thomas Hen- 

 derson, Esq 293 



XV. Analysis of Scientific Books 294 



i. Philosophical Transactions of the Royal Society of London, for 

 the Year 1825. Part II . . ib. 



ii. Essai Geognostique sur le Gisement des R6che8, dans les deux 

 Hemispheres 306 



XVI. Miscellaneous Intelligence. 



Mechanical Science. 



U Steam Engines employed in Glasgow and its Neighbourhood. 

 2. Times of the Motion of Solar Spots. 3. Naphtha Lamps, or 

 Lights. 4. Method of browning Iron. 5. Observations on Calca- 

 reous Cements. 6. On the Cultivation of the Potato, considered 

 as to its produce in Potash and in Roots. 7. Magnetism. 8. Naval 

 Architecture . 328 



II. Chemical Science. 



1. Apparatus for exhibiting the simultaneous Rotation of Two 

 Voltaic Conducting Wires round the opposite Poles of Magnets. 2. 

 On the Mutual Action of Magnetic and Unmagnetic Bodies. 3. On 

 the Voltaic Pile and Currents. 4. Electro-magnetic Current. 5. 

 Electric Powers of Oxalate of Lime. 6". Course of Lightning on 

 and under the Surface of Ground. 7. Cold produced by the combina- 

 tion of Metals. 8. Light produced during Crystallization. 9. Colour 

 of Glass affected by Light. 10. Curious change of colour in Oxides 

 of Cobalt and Zinc. 11. Nature of Colour in Mineral Productions. 

 12. On the Means of testing for Iodine. 13. Presence of Iodine in 

 Sulphurous Mineral Waters. 14. On the advantageous Preparation 

 and Ammoniacal Compounds. 15. Test of the presence of Muriatic 

 of Nitric Acid, or Salts of these Acids. 16. New production of 

 Anhydrous Sulphuric Acid. 17. Hygrometrical Indications by Sul- 



