APPENDIX 



535 



APPROXIMATE EQUIVALENTS OF THE l FRENCH (METRIC) AND 

 ENGLISH MEASURES 



I yard ii meter. 



II meters 12 yards. 



To convert meters into yards Add i^th. 



1 meter -. 1.1 yd. ; 8.3 ft { 3 ".' 3 f in ^ e ft s ( ^ le f>' . 



I 40 inches (1.6 per cent less). 



1 meter, by the Stand. Commission. =39.38203 inches. 



1 meter, by the Act of 1878 =39.37079 inches. 



1 foot 3 decimeters (more exactly 3.048). 



1 inch 25 millimeters (more exactly 25.4). 



1 mile 1.6 or If kilometers (more exactly 1.60931). 



1 kilometer f of a mile. 



1 chain (22 yards) 20 meters (more exactly 20.1165). 



5 furlongs (1100 yards) 1 kilometer (more exactly 1.0058). 



1 square yard f square meter (more exactly .8361). 



f lOf square feet. 



1 square meter < 



I 1^ square yards. 



1 square inch 6j square centimeters (more exactly 6.45). 



1 square mile (640 acres) 260 hectares (0.4 per cent less). 



1 acre (4840 square yards) 4000 square meters (1.2 per cent more). 



1 cubic yard -f cubic meter (2 per cent more). 



1 cubic meter 1^ cubic yards (If per cent less). 



1 cubic meter 35j cubic feet (.05 per cent less). 



1 cubic meter of water 1 long ton nearly. 



1 kilogram 2.2 pounds fully. 



1000 kilograms j l long ton nearfy 



1 metric ton J 



1 long hundredweight 51 kilograms nearly. 



1 United States hundredweight .... 45^ kilograms nearly. 



OBJECTS VISIBLE AT SEA LEVEL IN CLEAR WEATHER 



The following table shows the distance at sea level at which objects are 

 visible at certain elevations: 



Feet. 



Miles. 



Feet. 



Miles. 



Feet. 



Miles. 



Feet. 



Miles. 



31 

 96 

 24 

 49 



3.73 



10 

 20 

 25 

 30 

 35 



4.18 

 5.92 

 6.61 

 7.25 

 7.83 



40 

 45 

 50 

 60 

 70 



8.37 



8.87 



9.35 



10.25 



11.07 



80 



90 



100 



150 



200 



11.83 

 12.25 

 13.23 

 16.22 

 18.72 



