78 



Sir J. South — Vibrations caused by Railway 

 1847, March 29.— I. 



[1863. 



No. 



Time. 



Observations. 



Yards. 



Remarks. 





h m s 









191 



54 5^ 





537 







55 13 



South gun; cross very 





two engines, 1 5 tons and 1 3 tons ; 





strong. 





train's length 334 feet. 



192 



55 4a 



Cross extremely strong- 



310 





193 



56 





374 





56 25 



Shaft gun. 







194 



56 49 





1057 





II. 



195 



7 36 





36 14 



196 



36 40 





37 25 



197 



37 43 



Cross 



Shaft gun. 

 Cross very strong 

 South gun. 

 Cross lost 



849 



333 

 940 



Velocity 33-4 miles ; train 67*5 tons ; 

 engine 14*5 tons ; train's length 

 226 feet. At 36°* 45« the stars lost 

 shape and were inosculated with 

 each other. 



III. 





7 47 43 



198 



48 10 



199 



48 41 





49 37 



200 



49 39 



Shaft gun. 

 Cross first seen 

 Cross strong . 

 South gun. 

 Cross lost .... 



426 

 302 



677 



Velocity 20*8 miles ; train 48 tons ; 

 engine 13 tons; train's length 150 

 feet. It was stopped by the police 

 at the entrance of the tunnel, and 

 went slowly through it — "crawl- 

 ing," in the words of the signal-man. 



IV. 



201 



8 4 6 





698 



Velocity 33-4 miles; train 92*5 tons; 





4 10 



Shaft gun. 





engine 15 tons; train's length 328 



202 



4 45 





301 



feet. 





5 21 



South gun. 







203 



5 44 





1018 





V. 



204 



8 33 





774 



Velocity 39*5 miles; train 55-5 tons ; 





33 



Shaft gun. 





engine 21 tons; train's lengrh 144 





34 20 



South gun. 





feet. "Ine night unfavourable from 



205 



34 37 





978 



clouds. 



1847, March 30.— I. 



206 



6 49 26 

 49 36 





771 



Velocity 29*0 miles ; train 122 tons ; 

 engine 18 tons; train's length 404 



Shaft gun. 



207 



50 10 



(5)twofaintparallellines 



314 



feet. 



208 



50 15 



Stars entirely confused.. 



302 



Observed by the late Professor James, 

 M^Cullagh, of Trinity College, 





50 58 



South gun. 





209 



51 16 





899 



Dublin. 





