451 



CONTENTS. 



(The figures refer to the folio at the bottom of the page.) 



TABLES FOR COMPARING THE MOST IMPORTANT MEASURES OF LENGTH USED 

 FOR INDICATING ALTITUDES. 



PAGE 



On the Various Standards of Measure, and their Relations ... . 7 



Comparison of the Measures of Length most generally used for indicating Altitudes. 



TABLE I. Conversion of French Toises into Metres . . . .14 



" II. Conversion of French Toises into Paris Feet ... 14 



" III. Conversion of French Toises into "English Feet . . .15 



" IV. Conversion of French Toises into Rhine Feet . . .15 



For converting Metres into different Measures. 



11 V. Conversion of Metres into Toises . . . . .16 



" VI. Conversion of Metres into Paris Feet . . . . . 17 



" VII. Conversion of Metres into English Feet 20 



" VIII. Conversion of Metres into Rhine or Prussian Feet . . 28 



" IX. Conversion of Metres into Feet of Vienna . . . .28 



For converting Paris or French Feet into different Measures. 



tl X. Conversion of Paris Feet into Toises ..... 29 



" XI. Conversion of Paris Feet into Metres . . . . .30 



" XII. Conversion of Paris Feet into English Feet ... 31 



" XIII. Conversion of Paris Feet into Rhine Feet . . . .32 



" XIV. Conversion of Paris Feet into Feet of Vienna ... 33 



For converting English Yards and Feet into different Measures. 



" XV. Conversion of English Yards into French Toises . . .34 



" XVI. Conversion of English Yards into Metres . 34 



" XVII. Conversion of English Feet into Metres . . . . . 35 



" XVIII. Conversion of English Feet into Paris Feet 



" XIX. Conversion of English Feet into Rhine Feet . . 37 



" XX. Conversion of English Feet into Feet of Vienna . 38 

 E 5 



