86 



RADII OF WHEELS. 



VI. 



Table of the Radii of Wheels, from Ten to Three Hundred Teeth, 

 the Pitch* being Tico Inches. By Mr. B. Donkin, 

 Millwright, Dartford, Kent\. 



Table of the 

 radii ot wheels. 



No. 



Radius 















of 



in 





No. 



Radius. 





No. 



Radius. 



Teeth 



Inches. 















10 



3,236 



42 



13,382 



74 



23,562 



11 



3,549 





43 



13,700 





75 



23,880 



12 



3,864 





44 



14,018 





76 



24,198 



\S 



4,179 





45 



14,336 





77 



24,517 



14 



4,494 





46 



14,654 





78 



24,835 



16 



4,810 





47 



14.972 





79 



25,153 



16 



5,126 





48 



15,290 





80 



25,471 



17 



5,442 





49 



15,608 





81 



25,790 



18 



5,759 





50 



15,926 





82 



26,108 



19 



6,076 





51 



16,244 





83 



26,426 



20 



6,392 





52 



16,562 





84 



26,744 



21 



6,710 





53 



16,880 





85 



27,063 



22 



7,027 





54 



17,198 





86 



27.381 



23 



7,344 





55 



17,517 





87 



27,699 



24 



7,661 





56 



17,835 





88 



28,017 



25 



7,979 





57 



18,153 





89 



28,336 



26 



8,296 





58 



18,471 





90 



28,654 



27 



8,614 





59 



18,789 





91 



28,972 



28 



8,931 





60 



19,107 





92 



29,290 



29 



9,249 





61 



19,425 





93 



29,608 



30 



9,567 





62 



.19,744 





94 



29,927 



31 



9,885 





6'3 



20,062 





95 



30,245 



32 



10,202 





64 



20,380 





96 



30,563 



^3 



10,520 





65 



20,698 





97 



30,881 



34 



10,838 





66 



21,016 





98 



31,200 



35 



11,156 





67 



21,335 





99 



31,518 



36 



11,474 





68 



21,653 





100 



31,836 



37 



11,792 





69 



21,971 





101 



32,1>>5 



38 



12,110 





70 



22,289 





102 



32,473 



39 



12,428 





71 



22,607 





103 



32,791 



40 



12,746 





72 



22,926 





104 



33,109 



41 



13,064 





73 



23,244 





105 



33,427 



• By the pitch is underftood the diflance between the centers of 

 two contiguous tcetl)^ and by the radius is underftood the diftance 

 between the center of the wheel and the center of each tooth. 



t Communicated by the author. 



No 



