BABBAGE ON THE TEMPLE OF SERAPIS. 



215 



No. 3. Table shoiviiig the Expansion, in feet and decimal parts, of 

 Granite from 1 to 500 miles thick, for various additions of tem- 

 perature. 



Miles 



in 

 thick- 

 ness. 



Degree of Fahrenheit's Scale. 





1. 



20. 



50. 



100. 



200. 



500. 



1000. 



3000. 



1 



•0255 



•510 



1-275 



2-55 



5-10 



12-75 



25-5 



76-5 



5 



•1274 



2-548 



6-370 



12-74 



25-48 



63-70 



127-4 



382-2 



10 



•2548 



5-096 



12-740 



25-48 



50-96 



127-40 



254-8 



764-4 



15 



•3821 



6-642 



19-105 



38-21 



76-42 



191-05 



382-1 



1146-3 



20 



•5095 



10-190 



25-475 



50-95 



101-90 



254-75 



509-5 



1528-5 



25 



•6369 



12-738 



31-845 



63-69 



127-38 



318-45 



636-9 



1910-7 



30 



•7642 



15-286 



38-215 



76-43 



152-86 



382-15 



764-3 



2292-9 



35 



•8917 



17-834 



44-585 



89-17 



178-34 



445-85 



891-7 



2675-1 



40 



1-0190 



20-380 



50-950 



101-90 



203-80 



509-50 



10190 



3057-0 



45 



11464 



22-928 



57-320 



114-64 



229-28 



573-20 



1146-4 



3439-2 



50 



1-2738 



25-476 



63-690 



127-38 



254-76 



636-90 



1273-8 



3821-4 



55 



1-4012 



28-024 



70-060 



140-12 



280-24 



700-60 



1401-2 



4203-6 



60 



1-5286 



30-572 



76-430 



152-86 



305-72 



764-30 



1528-6 



4585-8 



65 



1-6559 



33-118 



82-795 



165-59 



331-18 



827-95 



1655-9 



4967-7 



70 



1-7833 



35-666 



89-165 



178-33 



356-66 



891-65 



1783-3 



5349-9 



75 



1-9107 



38-214 



95-535 



191-07 



382-14 



955-35 



1910-7 



5732-1 



80 



2-0381 



40-762 



101-905 



203-81 



407-62 



1019-05 



2038-1 



6114-3 



85 



2-1655 



43-310 



108-275 



216-55 



433-10 



1082-75 



2165-5 



6496-5 



90 



2-2928 



45-856 



114-640 



229-28 



458-56 



1146-40 



2292-8 



6878-4 



100 



2-5476 



50-952 



127-380 



254-76 



509-52 



1273-80 



2547-6 



7642-8 



200 



5-0952 



101-904 



254-760 



509-52 



1019-04 



2547-60 



5095-2 



15285-6 



500 



12-7380 



254-760 



636-900 



1273-80 



2547-60 



6369-00 



12738-0 



38214-0 



In order to employ this table for the expansion of marble under the same cir- 

 cumstances, increase the number found by the above table one-sixth. To find the 

 expansion of sandstone, double the number found in the table for granite. 



This table was computed by the Difference Engine from the first 

 line, which was of course taken from experiment. 



It will be observed that the numbers are always true to the last 

 figure, a compensation made by the engine itself. As however the 

 machine had not then been taught to print its computations, the ac- 

 curacy of the table can only possess that of careful printing. 



q2 



