CONTENTS. 



Page 

 Art. I. Biograpliical Memoir of the late Friedrich Hoffmann, 



Professor of Geology in the University of Berlin, I 

 IL Upon the Formation of Crystals in the CJells of 



Plants. By Dr F. Unger, . . 19 



III. On the Classification and Antiquity of the Cheirop- 



tera. By M. de Blainville, . 21 



IV. On the Propriety of Forming National Casting Esta- 



blishments, with Observations on the Improve- 

 ments which would result to Science, Literature, 

 and Taste, by the adoption of such a measure. 

 By C. W. Wilson, R. I. A., and A. S. A. Com- 

 municated by the Society of Arts for Scotland, 28 



V. Survey of the Surface of the Moon. By Wm. Beer 



and Dr J. H. Madler of Berlin, . 38 



1. Physiognomy of the Moon's Surface, . 38 



2. Supposititious Architectural Remains in the Moon, 46 



3. Do Rivers occur in the Moon? . . 48 



4. Lunar Atmosphere, . . 48 



5. Concerning some observations which appear to indi- 



cate the existence of a Lunar Atmosphere, 51 



6. Non-existence in the Moon of Clouds, Seas, &c. 52 



7. Light and Colour of the Moon, . . 54 



8. Physical Remarks upon the Eclipses of the Moon and 



of the Sun, relating principally to the appear- 

 ances which the former luminary presents dur- 

 ing these interesting phenomena, . 62 



9. On the effect of the Earth's light upon the Moon, 65 

 10. On the Meteorological influence of the Moon, 67 



VI. Remarks on some prevailing Misconceptions concern- 

 ing the Actions of Machines. By Edward Sang, 

 Esq. Communicated by the Society of Arts for 

 Scotland, .... 70 



