一 235 — 
! U ^ sto l? all trafiic ； ho therefore proposes that subordinates slionld be first carefully 
^structed undor the superintendence of the chief inspector, and that afterwards it 
ouW be their duty frequently to examine the structures, a formal report from per- 
soiaal observation being made him once in two years, and that the load- test should 
) e em ployeil only once in ten instead of five years. 
The special observations, it is suggested, should includo the effect of temper- 
upon length of the girders, tlie amount of movement in the roller becl-plate 
trains moving in both directions, the comparative distances apart of the welb 
^'ticals, measured near tlie top anil bottom flanges wlien the girder is loaded, and 
^teval deflection caused by wind pressure uucler the conditions of a loaded aiad 
如 loaded girder. 
t The author recommends that a book should be kept for the entry of the inspoc- 
de f e P 01 、 t 8 , tlie information being un(]er the following headings viz : namo, short 
escription, aud, where possible, tlie calculation of the strains,! and a general sketch 
, details of the most important parts ; weights of iron in the construction, total 
f ei 伽 of superstructure ; details as regards the history of the construction, name 
akei. &c., character of the materials, and results of experiments as to strength, 
aiJ iouiit of deflection under moving and fixed load &c.” 
According to the nomenclature of this treatise tliis word should be shoo-plate. 
' Stresses. 
