﻿Plastic Bendlnq of Metals. 



187 



earlier photographs are inclined in the opposite sense to those 

 for later photographs. 



Table I. gives complete particulars of a set of eleven 

 photographs taken during the sagging of a single specimen, 

 while Table II. shows the agreement between the observed 

 values of at and those calculated from equation (A) for one 

 of these photographs (number seven). 



Lead Wire. Length 



Table I. 

 11*05 cm. 



Diameter = '023 cm. 



Lead began to'sag July 21 at 12 h 35™ 49'5 S p.m. 







Time 















in 



a. 



n. 



Temp. 



Remarks. 







Minutes. 













h m s 









o 





First Photo taken July 21 at 12 36 44 



•90 



9-44 

 9-01 



•638 

 •636 



18-2 C. 





Second ,, ., 



12 38 16 



243 



18-2 



Third 



12 48 21 



1252 



7-90 



•634 



18-1 





Fourth „ 



1 1 29 



25-65 



7-53 



•627 



18-1 





Fifth 



1 40 57 



65-2 



7-08 



•616 



18-2 





Sixth 



2 46 36 



131 



6-50? 



•612 



181 



Faint plate. 



Seventh ,, ., 



3 8 43 



153 



6-54 



•606 



18-1 





Eighth 



5 2 3 



266 



6-13 



•600 



18-2 





Ninth 



July 22 at 10 12 29 



1296 



5-26 



•580 



17-8 





Tenth 



July 23 at 2 25 3 



2990 



4-81 



•571 



16-9 





Eleventh „ ,, 



July 24 at 3 25 18 



4490 



4-59 



•566 



18-2 









Table II. 







| 



X 



X 



1 



X 



X 



y- 



observed. 



calculated. 



y- 



observed. 



, calculated. 



0... 











17... 



36-35 



36-41 



i.. 



6-5 



6 54 



18... 



37-65 



37-69 



2 .. 



100 



9-95 



19... 



38-9 



3895 



3... 



12-75 



12-73 



20... 



40-05 



40-18 



4... 



15-15 



1515 



! 21... 



413 



41-39 



5... 



17-3 



1734 



i 22... 



425 



42-57 



6... 



19-4 



1937 



i 23... 



437 



43-73 



7... 



21-3 



21-27 



24... 



44-8 



44-87 



8... 



231 



23-08 



25... 



45-95 



46-00 



9... 



24-8 



2477 



26... 



47-1 



4710 



10... 



26-5 



26-40 



27... 



48-15 



48-19 



11... 



28-0 



2797 



30... 



51-4 



5147 



12... 



29-6 



29-48 



1 35... 



56-55 



56-40 



13... 



31-0 



30-95 



40.. 



61 -45 



61-16 



14... 



32-3 



32 52 



50... 



70-8 



7001 



15... 



33-75 



33 - 75 



' 60... 



S0-2 



78-19 



16... 



3505 



35-10 



1 *'79'55 



1 



*98*2 



92-76 



Coordinates of extremity. 



