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“With
the many new ideas regarding minerals and methods for their study
that must be introduced into an elementary course, something of
the old has to go. It has been a difficult problem for me, and
I imagine for other instructors, to decide what to leave out.
The chemistry of minerals must remain, but any techniques that
save time in determination of constituent elements leaves more
time in the laboratory for other things. This is what we found
to be the greatest value of the Vreeland Spectroscope. It eliminated
many of the old blowpipe tests and supplementary wet chemical
tests by giving comparable results in a shorter time. The instrument
has also been used by graduate students for a quick check for
the elements present in some of their unknown minerals.”
Dr. Cornelius
S. Hurlbut, Jr.
Professor of
Mineralogy
Harvard University
“The instrument
is superior in convenience of use to any other I know of in its
price range. I am using the Vreeland as an experiment in the Qualitative
Analysis Lab. It is used as many as 200 times a month and reinforces
students’ previous knowledge of atomic spectra.”
Professor of
Chemistry, Michigan
“The response to the Vreeland
is always one of excitement and enthusiasm. The possibility that
these freshmen, in their first college level science course, could
be using professional equipment gives the students a great boost
in morale and certainly results in a clearer idea of basic mineralogy.
The instrument has performed well and I have been able to make
the few adjustments necessary without sending it back or having
a technician come in – it is that simply designed. I have found
it of significant value in bringing vitality, interest and real
understanding to the course.”
John L. Roberts
Professor of
Geology
Bradford Junior
College
“The instrument presents a
very distinctive advantage in the utility of a small and inexpensive
apparatus for qualitative and semi-quantitative spectrum analysis
and should be inestimable value in a mineralogical or metallurgical
laboratory.”
Professor Welton
J. Crook
Stanford University
“The instrument performed better
than expected, and I am most happy with it. I hope to have the
instrument transferred to my own lab after completion of the project.”
Professor of
Geology, California
Involved in oceanographic
project
“It saves considerable time
by taking the place of wet analysis in many instances.”
Head of Department,
State Geological
Survey
“One of the most valuable teaching
aids we have ever purchased. The ability to confirm microscopic
identification of minerals with ease and rapidity has made students
far more enthusiastic.”
Professor of
Geology
California
“It provides very rapid analysis
of completely unknown materials.”
Ph.D. in research
Manufacturing
Corporation, CA
“It has completely eliminated
preliminary guess work in determining potential value of a piece
of ore, especially for ‘moly,’ copper, lead and zinc.”
Russel Axworthy,
President
Geochemical Mineral
Exploration
Laboratory, Sacramento,
CA
“It fascinates students of
mineralogy and replaces other, chemical tests. It gives confidence
as to element identification in samples brought in.”
Professor of
Geology
S. California
community college
“This is a superior instrument;
one of the best buys for a teaching tool I have ever made. It
has taken well the hard use and abuse it has been given. Principal
benefits: It gives new interest in quantitative analysis, understanding
of spectra theory and qualitative and quantitative techniques
as never before possible. For eight months of the year it is used
220 times a month and for two months, 500 times per month.”
Professor of
Chemistry
California State
College
“It provides an inexpensive
introduction to spectroscopy and shows what instrumental analysis
can do. It shows extreme sensitivity.”
Professor of
Physical Sciences
Louisiana
“It provides greater accuracy
in mineral identification and initiates students to spectroscopy.”
Professor of
Geology
Kentucky
“It provides a chance to introduce
principles of spectroscopy which are parallel to those of X-ray
optics.”
Professor of
Geology
Pennsylvania
“We find the Vreeland Spectroscope
extremely useful for mineralogical identification when used in
conjunction with microscopic and X-ray diffraction techniques;
for the great majority of routine samples it saves the time and
trouble of using the semi-quantitative emission spectrograph.
We check between 1000 and 2000 samples per year with our Vreeland.”
Geological
Engineer
Colorado
“This instrument has been helpful
particularly for the determination of what metallic elements might
be present in samples of unknown materials. It is also useful
for a quick check on the presence or absence of certain elements
in ores and refractories. We have found the instrument convenient
to work with. The use of comparison films is an ingenious idea.”
Head of an
applied research Lab.
Pennsylvania
“We have found this a very
useful machine for qualitative work, and we hope to be able to
find the money to purchase another one.”
Professor of
Geology
Georgia
“We find this instrument useful
for the detection of calcium, bismuth, cesium, chromium, copper,
iron, lead, lithium, magnesium, manganese, molybdenum, titanium,
and zinc.”
Chief Chemist,
analytical Lab
Manitoba, Canada
“We have been very pleased
with the instrument and believe that it is an important contribution
to any type of rapid qualitative analysis. Such an instrument
could be of great value to institutions which do a considerable
amount of quantitative work with more advanced equipment, as this
instrument can do the qualitative much more rapidly than can advanced
instruments.”
Assistant Professor
of Geology
Colorado
“It has been mainly of value
in the identification of minerals that are not readily soluble
and which contain unusual elements.”
Professor of
Chemistry
Georgia
“It gives us a positive check
that we are not giving away valuable mineral deposits when we
exchange Federal land for private land. Mineral evaluations and
appraisals are a tangible benefit. Expect some ‘soils’ work in
the future.”
Geologist,
U.S. Forest Service
Minerals Branch
“The deduction of man-hours
necessary for routine analyses have been tangible benefits from
use of the Vreeland.”
Chemist, Industrial
Corporation
Chicago
“Excellent teaching tool to
correlate with traditional wet methods of qualitative analysis.”
Professor of
Chemistry
State College,
New England
“Tangible benefits have been
the study of trace amount of silver in sulfate minerals.”
Professor of
Geology
Massachusetts
“It is extensively used during
the beginning of our mineralogy course on an individual basis
with classes of 45 students. Extremely useful for the positive
identification of minerals. I consider it to be an extremely useful
instrument for introducing the principles and applications of
spectroscopy to mineralogy.”
Geology Professor
State University,
New England
“It saves time on preliminary
mineral identifications.”
Geologist,
U.S. Bureau of Mines
“I have found the instrument
so useful in the brief time that I have been incorporating its
use into my work that I would hate to give it up.”
Professor of
Geology
Pennsylvania
University
“It is used for pre-screening
samples for AA and other analyses.”
Chemist, analytical
laboratory
Texas
“It is used for identification
of metals in electronic scrappy. It makes identification of many
unknown metals much faster and reduces usages of the more expensive
emission spectrograph.”
Analyst, Bureau
of Mines
“I am in general impressed
with the simplicity and ease of operation of the instrument.”
Professor,
Community College
Washington
“A very useful spectroscope
from the standpoints of learning the theory of emission spectral
analysis and of applying the method in a very practical way.”
Professor of
Geology
Washington
“It is used for the identification
of ores, corrosion scales, residues, and precipitates. It cuts
down search time and reassures that everything of significance
has been found.”
Analyst, chemical
laboratory
Canada
“The tangible benefits are
that it allows for identification of elements in unknowns, with
limited preparation. Within the limits specified, the instrument
is exceedingly useful.”
Analyst, research
institute
Canada
“Its current applications are
screening samples for copper, zinc, chromium, lithium, barium,
bismuth, thallium, molybdenum, manganese, calcium, magnesium and
cesium.”
Chemist, mines
laboratory
Canada
“It is a very robust compact
sample instrument. It is very good for demonstrating spectroscope
analysis to students and they can soon learn to use it themselves.
It is very useful for the rapid identification of metals in soils
and in ore samples.”
Professor of
geology
British Commonwealth
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