-To disregard the theory of T-beams, and work by
rule-of-thumb, can hardly be considered good engineering.

_Tenth Point._--The author appears to consider theories for reinforced
concrete beams and slabs as useless refinements, but as long as theory
and experiment agree so wonderfully well, theories will undoubtedly
continue to be used.

_Eleventh Point._--Calculations for chimneys are somewhat complex, but
are better and safer than rule-of-thumb methods.

_Twelfth Point._--Deflection is not very important.

_Thirteenth Point._--The conclusion of the Austrian Society of Engineers
and Architects, after numerous experiments, was that the elastic theory
of the arch is the only true theory. No arch designed by the elastic
theory was ever known to fail, unless on account of insecure
foundations, therefore engineers can continue to use it with confidence
and safety.

_Fourteenth Point._--Calculations for temperature stresses, as per
theory, are undoubtedly correct for the variations in temperature
assumed. Similar calculations can also be made for shrinkage stresses,
if desired. This will give a much better idea of the stresses to be
provided for, than no calculations at all.

_Fifteenth Point._--Experiments show that slender longitudinal rods,
poorly supported, and embedded in a concrete column, add little or
nothing to its strength; but stiff steel angles, securely latticed
together, and embedded in the concrete column, will greatly increase its
strength, and this construction is considered the most desirable when
the size of the column has to be reduced to a minimum.

_Sixteenth Point._--The commonly accepted theory of slabs supported on
four sides can be correctly applied to reinforced concrete slabs, as it
is only a question of providing for certain moments in the slab. This
theory shows that unless the slab is square, or nearly so, nothing is to
be gained by such construction.

C.A.P. TURNER, M. AM. SOC. C. E. (by letter).--Mr. Godfrey has expressed
his opinion on many questions in regard to concrete construction, but he
has adduced no clean-cut statement of fact or tests, in support of his
views, which will give them any weight whatever with the practical
matter-of-fact builder.

The usual rules of criticism place the burden of proof on the critic.
Mr. Godfrey states that if his personal opinions are in error, it should
be easy to prove them to be so, and seems to expect that the busy
practical constructor