150 APPENDICES 



APPENDIX VI 



TABLE OF METRIC MEASURES WITH THEIR ENGLISH EQUIVALENTS 



A metre was formerly supposed to be the TTnroVo (To P^^t of the distance of the pole of the earth 

 to the equator measured along a given meridian. Owing, however, to an error it is known now to 

 be too short. Hence, the metre is really the length of a definite standard kept in Paris. 



a micron (usually written fx) = ywoo millimetre = -00003937 inches, 



a millimetre = ^\ centimetre = yoVo metre ^ '03937 



a centimetre = yV decimetre = ^-i-jy metre = "39370 „ 



a decimetre = metre = 3 93704 



APPENDIX VII 

 A TABLE FOR CONVERSION OF BRITISH AND METRIC MEASURES 



MiCKO-MlLLIMETKES &C., INTO INCHES, ETC. 



fl. 





inch 





mm. 



inch 



I 





•000039 





I 



= -039370 



2 



= 



•000079 





2 



= -078741 



3 





•0001 18 





5 



= -196852 



4 





•0001 57 





10 (i cm.) = -393704 



5 





•000197 





20 



= -787409 



6 





•000236 





50 



= 1*968522 



7 





•000276 





100 



= I decimetre. 



8 





•000315 









9 





•000354 









10 





•000394 









20 





•000787 



Example. — What 



is the equivalent in inches 



30 





•001 181 



to 21 ju. 







40 





•001575 





20 fX. 



= -000787 



SO 





•001969 





I fl 



= -000039 



60 





•002362 







•000826 



80 





•003150 









100 





•003937 









1000 





I •mm. 



Inches, 



ETC. IN 



MiCEOMILLIMETRES, ETC. 



inch 





/X. 





inch 



mm. 



1 



2 5 0 0 0 





1-015991 





1 



90 0 



= -028222 



1 



2 0 0 0 0 





I -269989 





1 



8 0 0 



= -031750 



1 



1 5 0 0 0 





1-693318 





1 



5 0 0 



= -050800 



1 



10000 





2-539977 





1 



= -253998 



1 



9 0 0 0 





2-822197 





1 



1 0 



= 2-539977 



1 



6 0 0 0 





5-079954 





1 



8 



= 3-174972 



1 



10 0 0 





25-399772 





1 



5 



= 5-079954 











8 



= 9-524915 



