343 



CONTENTS. 



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



1. BAROMETRICAL MEASUREMENT OF HEIGHTS. 

 On the Tables and Formulae 



Page 



7 



TABLE I. 

 II. 

 III. 

 IV. 

 V. 



VI. 

 VII. 



Tables based on Laplace's Constants 



Delcros' Tables, in Metrical Measures ..... 

 Guyot's Tables, in English Measures . . 

 Loomis' Tables, in English Measures ..... 

 Gauss' Tables, modified by Dippe, Old French Measures 

 Dippe's Tables, for reducing Barometrical Observations to another 



Level, and for computing Heights, Old French Measures 

 Babinet's Modification of Laplace's Formula .... 

 Baily's Tables, in English Measures . . 



Tables based on BesseVs Formula. 



" VIII. Plantamour's Tables, in Metrical Measures 



IX. 



X. 



XL 



XII. 



" XIII. 



" XIV. 



" XV. 



" XV. 



" XVI. 



" XVII. 

 D 



Miscellaneous Tables. 



Correction for the Hour of the Day at which the Observations have 

 been taken, Coefficients by Berghaus ..... 



Correction for the Hour of the Day, Old French Measures 

 Correction to be applied to the Half-Sums of the Temperatures 

 observed at Geneva and St. Bernard, and its Value in Metres at 

 all Hours and Seasons of the Year, by Plantamour 

 Computing Altitudes by the Height of the Barometer at the Sea- 

 Level .......... 



Mean Height of the Barometer at the Level of the Sea in various 

 Latitudes .......... 



Mean Height of the Barometer in all Months of the Year 



Mean Height of the Barometer at all Hours of the Day 



Tropic Hours of Daily Variation at Halle .... 



Amplitude of Daily Variations in Various Latitudes 



Reducing the Barometer to the Level of the Sea 



Height, in English Feet, of a Column of Air corresponding to a 



Tenth of an Inch in the Barometer 



Height, in French Feet, of a Column of Air corresponding to a 



Paris Line in the Barometer 



3 



x 9 

 31 

 47 



52 



58 

 66 

 67 



70 



78 

 79 



80 

 81 



83 

 84 

 84 

 85 

 85 

 86 



87 

 87 



