XXII GENERAL INDEX. 



Table V. Conversion of Nautical Square Leagues into Square Kilometres 

 Austrian Square Miles Prussian Square Miles German 

 Square Miles French Square Leagues Geographical Square 

 Miles English Square Statute Miles Russian Square Wersts 



" VI. Conversion of French Square Leagues into Square Kilometres 

 Austrian Square Miles Prussian Square Miles German 

 Square Miles Nautical Square Leagues Geographical 

 Square Miles English Square Statute Miles Russian Square 

 Wersts 



" VII. Conversion of Geographical Square Miles into Square Kilo- 

 metres Austrian Square Miles Prussian Square Miles 

 German Square Miles Nautical Square Leagues French 

 Square Leagues English Square Statute Miles Russian 

 Square Wersts . . 



" VIII. Conversion of English Square Statute Miles into Square Kilo- 

 metres Austrian Square Miles Prussian Square Miles 

 German Square Miles Nautical Square Leagues French 

 Square Leagues Geographical Square Miles Russian Square 

 Wersts 



" IX. Conversion of Russian Square Wersts into "Square Kilometres 



, Austrian Square Miles Prussian Square Miles German 



Square Miles Nautical Square Leagues French Square 



Leagues Geographical Square Miles English Square Statute 



Miles ........... 



" X. Table for comparing the most important Measures of Surface 



VI. METEOROLOGICAL TABLES FOR CORRECTING SERIES 

 OF OBSERVATIONS FOR THE PERIODIC AND NON- 

 PERIODIC VARIATIONS 



Temperature Hourly Corrections for Periodic Variations. 



NORTH AMERICA. 



Table I. Washington, D. C 



" II. Philadelphia, Girard College 



" III. " " " 



" IV. Frankfort Arsenal, Pa. 



a ~y 



" VI. Toronto, Canada West . 



" VII. " " " 



VIII. " " " 



IX. " " " 



" X. Montreal, Canada East 



" XL Sitka, Alaska 



