USEFUL TABLES. 



423 



Ueefid Data. 

 The gallon weighs 10 lbs. (of distilled \rater at 62° F.). 

 The litre weighs 1000 grammes (of distilled water at 0° C). 

 1 gallon = 4J litres approximately. 



1 barn gallon = 10 „ ,, 



1 kilogramme = 2^ lbs. approximately. 

 1 hundredweight = 50 kilogrammes approximately. 

 1 cubic foot = 6-24 gallons. 



Note. — The metre and litre compared with the standard English 

 measures are those defined by the Act of 1878, and are not the true 

 metre and litre. The difference is due to the fact that the English 

 measures refer to a temperature of 62° F., and the metric measures to 

 a temperature of 0° C. In the Weights and Measures Act of 1878 the 

 difference of temperature has not been allowed for. 



The following table shows the comparison between the two systems : — 



TABLE CXXXIX.— Baen Gallons and Impeimal Gamjjns 

 For the Conversion of Bam OaMoiu into Imperinl. Gulloiu. 



For the C'onrersioii of Imperial Oallon-i itUo Barn Gallons 



