- 



MEMOIR OF 



DANIEL TREADWELL. 







515 



Experiment No, 1. 



Experiment 



No. 2. 





Time. 





Mean Draft. 



Time. 





Mean Draft. 







ID. S. 



lb. 





m. s. 



lb. 





To 1 mile post 



2 50 



196 



To 1 mile post 



2 40 



185 





a 2 •« 



2 31 



123 



u " 



2 4o 



100 





a 3 



2 84 



105 



u 3 i< 



2 30 



72 





<< 4 it 



2 27 



135 



ti ^ « 



2 17 



97 





u 5 << 



2 30 



80 



« 5 " 



2 88 



52 





14 e 



3 8 



122 



U 6 U 



2 45 



84 





To Newton Corner 



1 20 



75 



To Xevvton Corner 



1 5 



45 







16 



836 





16 35 



041 





Mean draft of whole distance 119.4 



Mean draft of whole distance 1)1.6 



These experiments were made during a strong w r est wind. 

 Tuesday, November 1st. Run through the above distance with the engine Lion drawing the cars 

 as described in the foregoing experiments. Experiment No. 3 gives the account when the cars with large 

 gudgeons was tried. Experiment No. 4 gives the account when the car with small gudgeons was tried. 



Experiment No. 3. 



Experiment No. 4. 



Time. 



To 1 mile post 



u 



a 



2 

 3 

 " 4 



" 5 



6 



u 



(t 



« 



it 



ii 



n 



To Newton Corner 



m s. 

 3 20 



2 10 



2 15 



2 10 



2 10 



2 43 



50 



15 40 



Mean Draft, 

 lb. 



157 



130 



117 

 113 



93 



162 







772 



Time. 



To 1 mile post 



" 2 

 " 3 



" 5 



6 



u 



(i 



u 



4. 



.. 



». 



m 



8. 



5 



2 13 



2 22 

 2 10 

 2 26 

 2 39 



To Newton Corner 1 5 



16 



Mean Draft 

 lb. 



134 



83 

 47 

 64 

 42 

 57 

 48 



475 



Mean draft of whole distance 110.3 



Mean draft of whole distance 68 



The car used in experiment No. 4 had immediately before this trial run thirteen miles upon the road, 

 by which the gudgeons and boxes had become warm, and the oil and tallow used upon them softened. 

 Considering this as affecting the experiment by reducing the resistance, I made a trial with the same 

 car, on Friday, November 4th, taking the car and load after it had been at rest and the gudgeons and 



boxes were cold. 



Experiment made Friday, November 4th, with the engine Jupiter drawing the car tried in Nos. 2 



and 4, the gudgeons and boxes being cold. 



Experiment No. 5. 



Time. 



To 1 mile post 



n 9 



a 



a 



« 3 



" 4 



« 5 



« 6 



■ 



To Newton Corner 



« 



.. 



i< 



Mean Draft. 



m. 



2 

 2 



42 



18 



2 30 

 2 32 



2 30 



3 18 

 50 



1640 



Mean draft of whole distance 



lb. 



155 



90 



60 



66 

 54 

 55 



61) 



510 

 77.1 



The rise to Newton Corner is 45 feet. Distance 6| miles = 33,000 feet, which is one foot in 73 



O. 



Then we have the load carried in Nos. 1 and 3—15,820 lb. 



733 



21.6 lb. — as the resistance from 



elevating the load 45 feet in 33,000, and the load used in Nos. 2, 4, and 5—13,880 ~ 733 = 18.9 lb. 





