NOTE BY THE TRANSLATOR. 



IN the translation the temperatures are given in degrees of 

 Fahrenheit, retaining at the same time the original figures in 

 Reaumur's scale. In the same manner the measures are 

 given in English feet, generally retaining at the same time 

 the original statements in Parisian or French feet or toises, a 

 desirable precaution where accuracy is important. The miles 

 are given in geographical miles, 60 to a degree, but in this 

 case the original figures have usually been omitted, the con- 

 version being so simple as to render the introduction of error 

 very improbable. In a very few instances " English miles" 

 appear without any farther epithet or explanation; these 

 have been taken by the author from English sources, and 

 may probably signify statute miles. The longitudes from 

 Greenwich are substituted for those from Paris, retaining in 

 addition the original statement in particular cases. 



