CONTENTS 



OF THE FIFTY-FOURTH VOLUME. 



On the Question " Whether Music is necessary to the Orator, — 

 to what Extent^ and how most readily attainable?" . . 1 



Report by the Select Committee of the House of Commons ^^ on 

 Mr. Telford's Plan for building a Hanging Iron Bridge 

 across the Menai Strait. . . . . . • . . H 



On the Nature and Laws of Friction : being a Continuation of 

 the Paper on the same Subject, given in our last Folume. 19 



Account of the Climate, Natural Products, Arts, and Manu- 

 factures of the Kingdom of Ashantee and some of the Terri- 

 tories adjacent . . . . . . . . 26 



On finding the Longitude by Lunar Observations. , , 34 



On Aerolites. . . . . . . . . . • . . 39 



Observations on the Study of Mineralogy. . . . . 43 



On an old Method of marking Dates on Manuscript Books. 46 



Experiments for a new Theory of Vision, . • • • ^^ 



Observations on the Means of preserving Provisions and Goods. 

 ■^ ^ ■ ^ 58^ 141 



On Dr. Cartwright's Pedo-motive Machine. . . . . 59 



Observations on the Measurement of an Arc of the Meridian. 60 



On Cohesion. . . . , . . . . . . . . 81 



Observations on the Relation of the Laiv of Definite Proportions 

 in Chemical Combination, to the Constitution of the Adds, 

 Alkalis, and Earths 90,182 



On the Lunar Atmosphere. . , . . • • # # 101 



Vol.5'4.No.260. D*c. 1819. a On 



