Repeated Stresses on Structures

M R . L. SCOTT WHITE, M.Inst.C.E., M.I.Struct.E., in proposing a vote of thanks, said that Mr. Sparkes had delivered a very technical lecture in a most interesting way. Road construction had made very rapid progress during the last thirty or forty years., in which the use of concrete had largely figured. Mr. Sparkes still found, after making many experiments in conjunction with his colleagues, that no final recommendations could be made on the subject, and it appeared that final conclusions were still a long way off. Meanwhile he had given much useful information which helped considerably in the study of the subject.

SCOPE OF THE PAPER. This paper deals with the design, construction and erection of several factories at home and abroad, and with the mohfied design of others contemplated to meet the danger of aircraft attack. To avoid a voluminous compilation the descriptive text is divided into :- Section 1. A commercial explosives factory. Section 2. A military explosives factory. Section 3. A propellants factory. Section 4. Propellants factories designed to limit or prevent undue disruption when subjected to aerial attack. C. L. Boucher and D. Bagley