SIR,-with all due respect to Mr. Edward Godfrey, I do not consider he is justified in the deductions he draws from Euler's Formula.
The new development in concrete road construction,whereby roads and pavements built on the “Anchorete” system are laid without joints, visible cracks, or warping, is dealt with in the booklet "Concrete Roads, Past, Present and Future.” J.H. Walker
The task of the engineer entrusted with the design of a structure is two-fold. First, he must clearly appreciate and value the external forces which his structure must resist. And, second, he must dispose and proportion the parts of his structure so that each is able to withstand the several forces it will be subjected to. In dealing with this latter, the consideration of how the material will behave under stress immediately arises. What is going on in material of his structure, as well as what is going on in the structure as a whole, becomes of importance. Harry Jackson
Concrete and reinforced concrete are employed in a great many branches of civil engineering. Since the time when reinforced concrete was first used as a part of framed structures up to the present time, research work has helped to develop our knowledge of the characteristics of the material concrete and of reinforced concrete structures. But it can by no means be said that all problems are completely solved. Dr. E. Probst