Geographical Tables. 319 



First pair, one inch, seventeen and a half twentieths. 



Second pair, one inch, seventeen twentieths. 



Third pair, one inch, sixteen and a half twentieths. 



It may be seen by these dimensions, that with the present 

 faces of the cube, had there have been no decrement of the solid 

 angles, but the whole space filled, and the cubic faces extended to 

 form a square figure, it would not have been a perfect cube. A. 



TABLES 



For converting French Toises and Metres into English Feet, and the contrary. 



Readers of philosophical works, and foreign journals, frequent- 

 ly meet with dimensions expressed in French measures. To 

 enable such to convert them readily into English measures, the 

 following tables have been computed. The length of a toise and 

 a metre in English measure, which are the foundation of the ta- 

 bles, have been taken from Baily's Astronomical Tables and For- 

 mulcB, and he deduced them from their lengths, as given in the 

 Base du Systeme Metrique, vol. iii. and Captain Kater's paper on 

 the length of the French metre, in the Phil. Trans, for 1818. 



^ TABLE I. 



1 French Toise = 1.949036 French Metres = 6.394950 English Feet. 

 I French Metre = .513074 Toise = 3.280899 English Feet. 



1 English Foot == .156373 Toise = .304794 French Metre. 



TABLE n. FOR CONVERTING FRENCH TOISES INTO ENGLISH FEET. 



Toises. 



English 

 Feet. 



Toises. 



English 

 Feet. 



T. 



English 

 Feet. 



T. 



Eng. 

 Feet. 



T. 



Eng. 

 Feet. 



T. 



Eng. 

 Feet. 



1000 



6394.95 



100 



639.50 



'lO" 



63.95 



1 



6.39 



.1 



.64 



.01 



.06 



2000 



12789.90 



200 



1278.99 



20 



127.90 



2 



12.79 



.2 



1.28 



.02 



.13 



3000 



19184.85 



300 



1918.49 



30 



191.85 



3 



19.18 



.3 



1.92 



.03 



.19 



4000 



25579.80 



400 



2557.98 



40 



255.80 



4 



25.58 



.4 



2.56 



.04 



.26 



5000 



31974.75 



500 



3197.48 



50 



319.75 



5 



31.97 



.5 



3.20 



.05 



.32 



6000 



38369.70 



600 



3836.97 



60 



383.70 



6 



38.37 



.6 



3.84 



.06 



.38 



7000 



44764.65 



700 



4476.47 



70 



447.65 



7 



44.76 



.7 



4.48 



.07 



.45 



8000 



51159.60 



800 



5115.96 



89 



511.60 



8 



51.16 



.8 



5.12 



.08 



•51 



9000 



57554.55 



900 



5755.45 



00 



575.55 



9 



57.55 



.9 



5.76 



.09 



.58 



TABLE III. FOR CONVERTING FRENCH METRES INTO ENGLISH FEET. 



Metres. 



English 

 Feet. 



Metres. 



English 

 Feet. 



M. 



English 

 Feet. 



M. 



Eng. 

 Feet. 



M. 



Eng. 

 Feet. 



M. 



Eng. 

 Feet. 



1000 



3280.90 



100 



328.09 



10 



32.81 



1 



3.28 



.1 



.33 



.01 



.03 



2000 



6561.80 



200 



656.18 



20 



65.62 



2 



6.56 



.2 



.66 



.02 



.07 



3000 



9842.70 



300 



984.27 



30 



98.43 



3 



9.84 



.3 



.98 



.03 



.10 



4000 



13123.60 



400 



1312.36 



40 



131.24 



4 



13.12 



.4 



1.31 



.04 



.13 



5000 



16404.50 



500 



1640.45 



50 



164.04 



5 



16.40 



.5 



1.64 



.05 



.16 



6000 



19685.40 



600 



1968.54 



60 



196.86 



6 



19.69 



.6 



1.97 



.06 



.20 



7000 



22966.29 



700 



2296.63 



70 



229.66 



7 



22,97 



.7 



2.30 



.07 



.23 



8000 



26247.19 



800 



2624.72 



80 



262.47 



8 



26.25 



.8 



2.62 



.08 



.26 



9000 



29528.09 



900 



2952.81 



90 



295.28 



9 



29.53 



.9 



2.95 



.09 



.30 



10000 



32808.99 





















