674 Mr. A. A. Robb on the Conduction of Electricity 

 In order to facilitate its solution, the value of the function 



Q Uanh co J 



is tabulated along with the corresponding values of P, Q, R, 

 and S. Having in this way determined the value of coshco 

 at the negative plate we may find A^ thus 



*i 



and so complete the solution, 



Si 



(20) 



cosh a). 



P. 



Q. 



R. 



S. 



i 

 T. 



10 



•854 



1-000 



o-ooo 



0000 



000 



1-1 



•615 



1-187 



0-717 



1-059 



2-310 



12 



■564 



1-388 



0-953 



1-574 



2365 



1*3 



•530 



1604 



1119 



2024 



2-417 



1*4 



•518 



1-832 



1-250 



2-450 



2-468 



l\ r > 



■SOo 



2075 



1-360 



2869 



2-516 



1-fi 



•496 



2-330 



1-455 



3-287 



2-562 



1-7 



•489 



2599 



1-540 



3-709 



2-607 



1-8 



•483 



2-881 



1-616 



4-139 



2650 



1-9 



•478 



3-175 



1-686 



4-576 



2-692 



20 



•475 



3-482 



1-750 



5-023 



2731 



2'1 



•471 



3-802 



1-809 



5-481 



2-769 



2-2 



•469 



4-134 



1-865 



5-950 



2-806 



23 



•466 



4-478 



1-917 



6-430 



2842 



24 



•464 



4835 



1-966 



6-923 



2-876 



2-5 



•463 



5-203 



2013 



.7-428 



2-909 



2-6 



•461 



5-584 



2-057 



7-945 



2-942 



27 



•460 



5-977 



2099 



8-475 



2-974 



2-8 



•459 



6-381 



2-140 



9017 



3 005 



2-9 



•458 



6-797 



2178 



9-573 



3-034 



3-0 



•457 



7-225 



2-215 



10141 



3-063 



. 3-1 



•456 



7-664 



2 251 



10-722 



3091 



3-2 



•455 



8-115 



2-285 



11-316 



3119 



33 







8-578 



2-319 



11-924 



3-145 



34 



•454 



9050 



2-351 



12-544 



3-171 



3-5 





9-535 



2-381 



13-177 



3-197 



| 3-6 



•453 



10031 



2 411 



13-823 



3-222 



3-7 





10-538 



2-440 



14-482 



3-246 



3-8 



■452 



11-056 



2-469 



15-154 



3-270 



3-9 







11-586 



2-496 



15-839 



3-293 



40 



•451 



12126 



2-523 



16-537 



3316 



! 4-1 





12677 



2-548 



17-248 



3-338 



4-2 





13-239 



2-574 



17-972 



3-360 



43 



•450 



13-812 



2 598 



18-708 



3-381 



4-4 







14-395 



2-622 



19458 



3-402 



4-5 



. 



14-989 



2-645 



20-220 



3-422 



46 





15-594 



2-668 



-20*995 



3-442 



4-7 





16-210 



2-690 



21-783 



3-462 



