Word: proofing
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Dates: during 1910-1919
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...through the ventilating fine and heated it to a dangerous degree. The city fire department quickly extinguished the flames before the fire had burnt through the floor of the dining room; but the escape of the building from destruction was so narrow, that the Corporation later caused a fire-proof floor to be substituted in the Hall for the preceding hollow structure of wood...
These various losses and alarms induced the Corporation, after 1872, to take certain precautions against the spread of fire in their old buildings; and after 1880 to use, or ask for,--"slow-burning" or "fire-proof" construction in their new buildings...
...building, the large central portion, remains in its original form. Through generous gifts from several patrons, funds are now available for the reconstruction of this section. The work on the Herbarium has consisted of remodeling and considerably enlarging the previous structure along the lines of modern fire-proof construction. Dr. Asa Gray bequeathed his valuable collection of botanical specimens on the condition that it be kept in a building free from danger of fire...
...construction used in office walls and movable partitions. He has established the fact that a square yard of felt of a given thickness will absorb a certain amount of noise, and that if there is an overplus of noise, one must simply put up a corresponding area of sound-proof blanket. He has produced a long-fibre product of felt, designed to secure strength without losing absorbing power. The general result over the country has been the elimination in many cases of private offices, and the creation of large, single, office rooms, the ceilings and walls of which are treated...
...excellent opportunity is offered by the Philadelphia High Schools to teach classes of boys in Mathematics, Science, English, Ancient and Modern Languages, History, Drawing, Commerce, Manual Training or Physical Training. All applicants for teacher's positions in subjects other than Manual and Physical Training must show proof of graduation from an approved college, or equivalent education. Registration blanks and recommendations must be in the hands of the examiners by April 29, and an examination will be held in Philadelphia, on May 2. Further information may be obtained at University...