Old
Albion,
a college history published by the junior class of 1909, credits Dr.
Samuel Dickie, then professor of mathematics, with being the primary
promoter of constructing an observatory at Albion. The plan which he
presented to the Board of Trustees early in 1882, was to build and equip
an astronomy building by obtaining one hundred donations of $100 each.
The board voted to put the entire project in Dr. Dickie's charge. In
less than a year, the required monies were raised, allowing construction
to begin. The cornerstone was laid during ceremonies held on
September 8, 1883. The December 1883 Pleiad reported:
The erection of the
Observatory is rapidly progressing. Already the walls of the
building are nearly completed...The building, when completed, is to cost
$3,650. Alvan Clark & Sons, of Cambridgeport, Mass., are the
makers of the principal telescope...The entire cost of the telescope
placed in the observatory and ready for use, is to be $2,700. The
other instruments are to be made by Fauth & Co., of Washington, D.C.
They are to consist of a transit circle and telescope, $1,650, a
Chronograph, $350, and a Sidereal clock, $450.
Thus, the Observatory was built and equipped for
$8,800. The same Pleiad article concludes that the balance of
the completely successful "Observatory Fund" was to be expended
on pieces of "astronomical appliances," such as celestial maps,
charts, and probably books. The sources of the fund were not
uncovered during my research.
Upon the completion of the Observatory during the
summer of 1884, the College possessed an excellently equipped facility for
instruction and research in astronomy. In fact, the building was so
well equipped that the Smithsonian Institute recently expressed interest
in acquiring the equipment for it's historical significance if the College
ever wishes to dispose of it.
The Observatory has changed little in appearance since
it's opening. It is the only College building of Victorian
architectural style. The foundation above grade is cut stone, a
prestige feature of the period. The exterior walls of the structure
are of red brick, which was a marked deviation from the first three
College buildings -- North Hall, the old Central Building, and the Chapel,
which had been stuccoed. The Observatory's use of red brick
influenced it's use on all succeeding College structures: beginning with
the old gymnasium, the McMillan Laboratory, rebuilding fire-struck
Robinson Hall, the Gassette Administration Building, and all others built
since.
On the first floor today is located a large room
housing portions of the College archives and the Methodist Historical
Collection. At first, this room was a classroom for physics, math,
and astronomy. The first floor room also contained a small raised
stage at one time, according to records of the Albion College Players, who
consider the room the "birthplace" of their organization on the
campus in 1922. During the 1923-24 academic year, the co-operative
bookstore was established there, and remained for several decades.
Also located on the first floor are several storage areas, and a recently
added lavatory.
Climbing up the ornate circular stairway that winds
around the inside of the tower, one reaches the second floor. This
floor originally contained an astronomy library, a work room, and an
office, in addition to an observing room for the transit telescope and
related equipment.
The transit telescope is a 4" refractor mounted on
a single axis, so that it may be pointed only along the meridian, i.e., a
north/south arc. In the eyepiece of the telescope are several
parallel spider wires which are stretched vertically and horizontally
across it. The transit instrument is used to record the passage of
stars over the meridian, and thus enable an observer to find true sidereal
time.
Electrically connected to the transit instrument are an
astronomical clock and a chronograph. The grandfather-like clock
keeps sidereal, or star time, rather than solar time. It's dial is
divided into 24 hours rather than 12, and it registers seconds as well as
minutes. The chronograph is a revolving brass drummed instrument
powered by a falling weight. The drum is covered with paper, on
which a stylus records the time. This is accomplished by an observer
at the transit telescope pressing a telegraph-like key the instant when a
star crosses a spider thread in the telescope's eyepiece. This
allows the observer to calculate true sidereal time and correct for errors
in the sidereal clock. All of these instruments are in the process
of restoration.
A second short stairway brings one to the third floor
domed observing room for the 8" Clark refractor. This is the
College's primary telescope. The focal distance of the instrument is
about 10.5 feet. The telescope rests on an equatorial mounting that
tops a brick and masonry pier. This pier is structurally independent
of the Observatory itself, and extends into bedrock. In fact, the
smaller 4" transit telescope, the sidereal clock, and the chronograph
all have their own structurally independent piers. Of no small
expense, these architectural features prove that competent and thorough
research went into the building's design. The independent piers
assure that movement in the structure itself caused by walking or closing
a door will not be transmitted to any of the instruments.
Alvan Clark and Sons firm, of Cambridge, Massachusetts,
the makers of the primary telescope, were probably the most highly
regarded American telescope builders of the nineteenth century. Five
times Alvan Clark and his two sons made the largest refracting telescopes
in the world, including the 40" instrument at the Yerkes Observatory.
Their reputation was doubtless the reason for their selection for building
the Albion telescope. Old Albion reports that the Albion
instrument was made by Alvan Clark himself, and was the last telescope he
made before his death. This claim may well be true, for Scientific
American, September 24, 1887, (the year in which Alvan Clark died)
states in an article about the Clark Company that Alvan stopped building
telescopes about four years before he died, or 1883 -- the year the Albion
telescope was probably being built. Eighty years later, when the
famous astronomer Harlow Shapley of the Mount Wilson Observatory examined
the Albion instrument during the mid-1960's, he told the College that it
owns a "Rembrandt."
Telescope making was a long and laborious process
during the 1880's, and precision was measurable primarily by the
craftsman's own eye, and not by the sensitive electronic measuring devices
employable today. It was for their uncanny ability to produce
high-quality, nearly perfect instruments that the Clarks were made famous,
and their work so highly regarded.
Then, as now, the most important part of the refracting
telescope was the quality of it's lenses. Initially, the lens began
as a lump of glass secured from a glass manufacturer. The best
manufacturers of the period were European. The glass lump would be
placed on a slab of fire clay within a form of the desired circular shape,
and exposed to heat. Slowly, the lump would melt, flatten, and
conform to the shape of the mold, thus furnishing the "blank."
If the blank proved to be clear and striae-free, it was ground into shape
and polished, eventually becoming a lens.
The Clarks used iron filings to grind their lenses -- a
technique they adapted from granite polishers -- instead of using emery
which was the usual custom of the day. The iron grains would not
wear out as rapidly as the emery. Belt-driven machinery provided the
rotation of the grinding discs between which the blanks and filings were
sandwiched. After several weeks of grinding, the blanks were removed
from the discs, polished, cleaned, and checked for defects.
The Clarks tested their lenses by developing a method
similar to, but preceding, Foucault's knife-edge test. The image of
a point source of light -- either an actual star or an artificial light --
was examined at the focal point of the lens. A perfectly figured
lens would appear uniformly illuminated, while an imperfect lens would
not. Once found, the irregularities would be marked with a red
powder, and the Clarks would them retouch the imperfect areas.
Correcting a defect involved applying rouge and water
to the proper area and rubbing. The lens would then have be
repolished, recleaned, and retested. Usually, the entire process
would need to be repeated several times, and would often involve several
months of grinding and testing and retesting before the lens was finished.
Alvan Clark's sense of touch was said to be so sensitive that even when a
lens appeared perfect to the eye, his fingers could still detect slight
irregularities. Several years of effort was often required to
perfect larger lenses. The Albion instrument, being relatively
small, probably took several months to a year to complete.
Once the lens [sic] were perfected, they would
be fitted to a metal telescope tube, dissassembled [sic], and
shipped by rail or ship to the proper destination. Often, one of the
Clarks themselves would reassemble the telescope and mount it in the
observatory. How the Albion instrument was installed is unknown.
Evidence is lacking of any important astronomical
discoveries at the Albion Observatory. Several Albion graduates in
astronomy have made substantial contributions to the science during their
lives however. Forest Ray Moulton '94 became director of astronomy
at the University of Chicago, and was the author of several books dealing
with astronomy, math, and ballistics. One of these books was
considered the standard text in celestial mechanics for many years.
Wilber A. Cogshall '95 worked at both the Lowell and Yerkes Observatorys [sic]
and designed a special reflecting telescope designed to photograph the
Milky Way and nebulae. From 1900 to 1941 he located the population
center in the United States using astronomical observations and Census
Bureau figures.
L. Wesley Underwood '86 discovered an unknown star
while still in high school, and built the Underwood Observatory at
Lawrence College, housing a Clark refractor. Class of 1914 graduate
John A. Aldrich's graduate work in physical astronomy resulted in a better
understanding of cepheid variables, which are used to determine the
distances between galaxies.
Charles M. Huffer '16 has served as secretary of the
American Astronomical Society, was formerly the chairman of the astronomy
department at the University of Wisconsin's Washburn Observatory, and has
authored several books in the science. Marvin J. Vann '40 directs
the observatory at Foothill College in California. He is the
inventory of a solar prominence telescope now in commercial manufacture.
In 1971 he donated the prototype instrument to the College in memory of
Dr. Clement Rood '94, professor of astronomy and physics at Albion from
1920 to 1939. All of these gentlemen's interest in astronomy was
sparked using the Albion Observatory.
In 1940, the Observatory's revolving dome was
electrified. Formerly, rotation of the dome was accomplished by
using a hand-powered crank or, as professor emeritus of astronomy Rood
told the May 17th Pleaid of that year, the old "armstrong
method" was used.
In more recent years the Observatory and the
instruments suffered substantial deferred maintanance [sic] and
deterioration brought on by the belief that a new observatory would be
built as part of the then-planned science center. Campus plans
issued during the College's APEX program (Albion Program for Excellence)
during the early 1960's reveal that the structure was to be torn down, but
an effort to save the building at that time was successful. Shortly
thereafter, restoration of the Clark telescope was initiated, as the years
had taken their toll on the instrument. In 1965, Dr. Charles Ricker
became the new physics department chairman, and continued the efforts of
the former chairman, Dr. Robert L. Luttermoser, to restore the equipment.
A team from the Yerkes Observatory came to the College to clean the main
telescope, and the weight-driven clock drive of the instrument was
replaced with an electrical mechanism a year or two later.
In the spring of 1971, the solar prominence telescope
donated by Marvin Vann was mounted piggy-back on the Clark refractor.
The new solar telescope allows the prominences of the sun to be studied
without eye injury. During the summer of 1972, the exterior of the
building was restored by the College. Much interior work remains to
be done.
Today the physics department and the College maintains
a structure and instruments of not only practical value in the instruction
of astronomy, but of historical significance as well. Unfortunately,
the focus of astronomy has shifted since 1884. The discipline is no
longer as concerned with the visual discovery of the existence of
celestial objects, as it is with studying their physical characteristics
and their relative distances from the Earth. The present equipment
is not sufficient for these new tasks.
In April of 1973, in consultation with Dr. John
Williams, associate professor of physics, a building plan for an addition
to the Observatory was drawn by the author and approved by the College.
The plans call for the construction of a new domed tower adjacent and to
the east of the existing building, and matching the original in
architectural style. This addition would house a 24" reflecting
telescope, spectographic [sic] equipment, a planetarium, and a
darkroom. Funding is now being sought, and the present building and
equipment are slated for complete restoration.
If the addition becomes a reality, it would the College
a centralized, updated, and complete astrophysical laboratory, and as the
Albion College Astronomical Observatory enters it's second century of
service, it would be prepared for involvement in the new era of astronomy.