New-York tribune., 1902-07-01

ing message TO King Edward OF Ehsi"
unanimously adopted:
The American Association for the AdyysarstiIate
of Science now meeting at Pittsburs cons sn nao-
YOUR majesty and the English and aInerIUai
P 9e he and express their that your
majesty's restoration to health VIII SO0" "
pete. r,,r rrss9dent
/. o. HOWARD, Permanent Secre'"'''
The various sections then proceedeu 70 soI,oI
halls. where they organized by electng one I'"
=, ~ council and adjourned until 2So p. m
This afternoon the vice-presidehts auui ~
various sections follows: - -.
VIZ president Mcmahon. before the section Oh
mathematics and astronomy. at the Oakland WEI.
o,,st F,niscopaI Church: subject, some ffeceht
Applications of the Function Theory 10 FhSsi0''
VIE president Brace before the section Vi
nhvsics in the middle lecture hall OF Carnegie
Institute; subject. 1.-The Group Velocity anu wave
Velocity of Light.
VIZ pres,dant Jacobv before the section of me-
cbanicaI science and engineering. at the FIRST
United Presbyterian Church; subject f'eceh'
Progress in American Bridge CONSTRUCTION
yice-President Galloway. before the section OF
botany in the audience room at the BeHeheld
Church; subject applied acknowledgements
and Prospective"
Vice President Van Hise, before the section OF
geology and geography. in the audience room Oh
the BelIefeId Church; subject. THE Training anu
Work of a Geoogist'
Vice President Fewkes before the section OF an
thropology. at the Oakland Methodist Episcopal
Church: subject. Prehistoric Porto Rico
Vice-President Hyde. before the section of social
and economic science at the First Presbyterian
Church
Tonight an Illustrated lecture was given by Dr.
Leonard p Kinnicutt. OF the Worcester Polytech-
Institute. the subject. THE Prevention OF
the Pollution OF Streams by Modern Methods OF
Sewage Treatment"
Professor Henry s. Jacoby. of Cornell Univer-
sty, in his address progress in bridge building.
said that owing to the increased weight Of mod
had been Obliged to rebuild their bridges In this
new construction much change in the specifications
more uniform steel and more attention to
secure stinness as wei as strehgth ia oriuses y
brief description was given OF the longest spans
of different classes of bridges and II was shown
ga 15 b We fs,i ceasee Ff I m Ip pincon 90 no
7so15 feet; and metallic arches to $40 feet I'm
portant changes in viaduct construction secured
stiffer structure with riveted connections Elevated
railroads had been improved in aesthetic appear
tons The bridge now building 6ver pa the 81 Law
renee near Quebec VIII nave span OF lsOe feet feet
in the world, but the longest span OF any kind OF
longest suspension bridge in the world. While
only four and half feet longer than the present
Brooklyn Bridge IL will be far stronger and stifer
The more general introduction of arch bridges
had greater esthetic value The as introurfinn te rIT
OF concrete steel arches indicative of progress
forms. required hardly any expense for main
tenauCe and had far longer life than steel
| bridges.
Reference was also made to the great stone
arch bridge built last year by the PENNSYLVANIA
Railroad over the Susquehanna River and that
now building over the Raritan River.
In movable bridges great changes had occurred
In the design of new types of lift bridges the
| improvement of old types. These are located
mostly in cities where dOckage valuable The
ferry bridge now building at Duluth was different
from any type in this country. The bridge over
the Charles River. in Boston. to be one of the
finest In any country. and showed that municfpaI
authorities were giving increased attention to The
importance or 9sthetic considerations in the de-
sign OF public works.