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Alluard Hygrometer

Maker:
W. M. Welch Scientific Company
Object Name:
Alluard hygrometer
hygrometer
Place made:
United States: Illinois, Chicago
Subject:
Measuring & Mapping
Thermometers and Hygrometers
Credit Line:
U.S. Weather Bureau
ID Number:
PH*334152
Catalog number:
334152
Accession number:
308253
Description:
Emile Alluard, professor of physics at the University of Clermont-Ferand and director of the meteorological observatory on the nearby Puy-de-Dôme, described this type of hygrometer in 1878. A modification of Regnault's instrument, it consists of a square vessel made of polished nickel-plated brass. At either side of the vessel, but not touching it, are strips of similar material. In use, the vessel would be filled with ether, and this ether would be cooled by evaporation by means of an aspirating bulb. When dew appears on the shiny surface of the vessel, a thermometer in the vessel indicates the temperature of the ether at that point. A second thermometer measures the ambient temperature.
Robert A. Millikan described the Alluard hygrometer as being one of the "most perfect forms of the dew-point hygrometer" in his Mechanics, Molecular Physics and Heat, a popular college text that was first published in 1903 and that aimed "to present Physics as a science of exact measurement." This example is marked "A Sign of Quality WELCH A Mark of Service / W. M. Welch Scientific Company / ESTABLISHED 1880 / 1515 SEDGWICK ST. CHICAGO, U.S.A." It was made between 1921 (when the W. M. Welch Scientific Company began as such) and 1960 (when it became Welch Scientific). It is missing the aspirating bulb and both thermometers.
Ref: M. Allouard, "Nouvel Hygromètre a Condensation," Journal de Physique et le Radium 7 (1878): 328-330.
W. M. Welch Scientific Co., Catalog G (Chicago, 1935), p. 157.
See more items in:
Medicine and Science: Physical Sciences
Thermometers and Hygrometers
Data Source:
National Museum of American History, Kenneth E. Behring Center
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INSTRUMENTS AND SUPPLIES FOR TEACHING MATHEMATICS

Author:
Welch Scientific Company
Type:
Books
Trade catalogs
Date:
1965
Topic:
Mathematics laboratories--EQUIPMENT AND SUPPIES
Notes:
Trade literature
Data Source:
Smithsonian Libraries
Visitor Tag(s):

Leo Baekeland Diary Volume 13, 1913

Author:
Baekeland, L. H. (Leo Hendrik) 1863-1944
Physical description:
Ink on paper
1 item, 6.0" x 3.5"
Type:
Biographies
Diaries
Place:
Yonkers (N.Y.)
Date:
1913
1913-1913
March 27, 1913 to June 30, 1913
1900-1913
20th century
Topic:
Laboratories
Automobiles
Tourism
Family
Local number:
AC0005-D13
Restrictions:
Unrestricted research use on site by appointment
Summary:
Inscription on flyleaf: "I / Journal of / Dr. L.H. Baekeland / Yonkers, NY [sic] / March 27, 1913 / to June 30, 1913." The diary details Baekeland's daily activities. He writes often of his visits and discussions, and the subjects of correspondence he has written and received. It sheds light on the use and distance of travel by automobile in the early twentieth century. In the notes, Baekeland explains increasing time spent in the laboratory in 1913
Cite as:
Leo H. Baekeland Papers, 1863-1968, Archives Center, National Museum of American History, Smithsonian Institution
See more items in:
Leo H. Baekeland Papers
Data Source:
Archives Center - NMAH
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Periodic Chart of the Atoms

Maker:
Welch Scientific Company
Measurements:
rolled: 58 in x 3 1/4 in; 147.32 cm x 8.255 cm
Object Name:
chart, periodic table
Date made:
1963
Subject:
Science & Mathematics
Sputnik
ID Number:
1994.0019.01
Accession number:
1994.0019
Catalog number:
1994.019.01
Description:
In the late 19th century, the Russian chemist Dimitry Ivanovich Mendeleev developed several charts in which chemical elements were grouped according to common properties. The atomic theory of matter developed over the next century suggested that these groupings could be explained by similarities in atomic structure.
In 1924, Henry D. Hubbard of the U.S. National Bureau of Standards prepared the first edition of this "Periodic Chart of the Atoms." It included symbols for the elements, atomic numbers, atomic weights, and descriptions of atomic structure. In the course of the twentieth century, numerous new elements were discovered and added to the chart. Physical data on the properties of elements also was incorporated. Wall charts became a fixture of the chemistry classroom.
The Periodic Chart of the Atoms was revised regularly by the NBS and published by the W. M. Welch Science Company of Chicago. This is the 1963 version of the chart, as prepared by spectroscopist William F. Meggars. High schools could purchase the charts with aid from the U.S. government. Some chemists working on curriculum projects of the time also prepared new forms of the periodic table.
Location:
Currently not on view
See more items in:
Medicine and Science: Chemistry
Sputnik
Data Source:
National Museum of American History, Kenneth E. Behring Center
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Philatelic index [manuscript] / compiled by John K. Tiffany, 1880-1881

Author:
Tiffany, John K (John Kerr) 1843-1897
Former owner:
Ricketts, William R (William Reynolds) 1869-1956 DSI
Physical description:
1 v. (206 p.) ; 25 cm
Type:
Manuscripts
Bibliography
Catalogs
Periodicals
Indexes
Place:
United States
Date:
1880
1881
Topic:
Postage stamps
Call number:
Z7164.P85 T54 1880
Notes:
Mechanically reproduced (lithographed or mimeographed?) from a handwritten draft, with addenda and corrections (apparently by J.K. Tiffany) added in pencil
"Part I. Citing all passages in the stamp journals refering to the stamps of the United States. St. Louis, January, 1880"--T.p
"Explanation. Having undertaken to put such information as I possessed in relation to the stamps of the United States in shape for publication for M. Moens I began by examining every stamp publication in my possession to ascertain what had already appeared in print upon my proposed subject. The references to these passages arranged under the various issues in their chronological order and brought down to date comprise this index. A chronological index of the various stamp journals, with their publishers each followed by the abbreviation used & by which it is quoted, a table of the abbreviations and numbers of the journals they designate is followed the list of the stamps, postal envelopes, postcards, document proprietary, card, private medicine card and match stamps and their varieties with citation of the various journals mentioning each in order. ... St. Louis, Jan. 1881"--P. [3]-[4]
Data Source:
Smithsonian Libraries
Visitor Tag(s):

[Trade catalogs on scientific laboratory equipment for physics, chemistry, biology, agriculture, and general science; blast lamps, microscopes, dissecting sets, tuning forks, pumps, balances, scales, meters, truss units, hydrogen ion apparatus; biological charts and specimens, lantern and microscopic slides, etc.; amateur science kits, radio and electrical apparatus; centrifuges, chemicals, laboratory furniture, mathematical models, physics apparatus and charts, etc.; classroom supplies, notebooks, pencils, erasers, desks, chairs, drinking fountains, maps, playground equipment, bells]

Author:
Welch Scientific Company
W.M. Welch Scientific Company
W.M. Welch Manufacturing Company
Smithsonian Libraries American History Trade Literature Collection DSI
Physical description:
<85> v. : ill
Type:
Catalogs
Trade catalogs
Date:
1915
1915-
Topic:
Scientific apparatus and instruments industry
Chemical apparatus
Measuring instruments
Electronic apparatus and appliances
Science--Slides--Catalogs
Laboratories--Furniture, equipment, etc
Schools--Furniture, equipment, etc
Physics--Experiments--Equipment and supplies--Catalogs
Biological laboratories--Equipment and supplies--Catalogs
Airguide (Brand name)
Notes:
Trade literature
Includes catalogs issued by: W.M. Welch Scientific Company; W.M. Welch Manufacturing Company
Data Source:
Smithsonian Libraries
Visitor Tag(s):

W. H. Welch Sextant

Maker:
Welch Scientific Company
Measurements:
overall: 2 1/4 in x 7 7/8 in x 7 1/4 in; 5.715 cm x 20.0025 cm x 18.415 cm
Object Name:
sextant
Place made:
United States: Illinois, Chicago
Date made:
ca 1929-1963
Subject:
Measuring & Mapping
Navigation
ID Number:
2004.0197.01
Catalog number:
2004.0197.01
Accession number:
2004.0197
Description:
Short discussions of the sextant began appearing in physics texts in the 1880s, and inexpensive sextants suitable for pedagogical purposes followed soon thereafter. This die-cast metal instrument is of that sort. Welch catalogs describe it as a "convenient demonstration model of an engineer’s or a mariner’s sextant." The scale is graduated every 30' from 0° to 120° and read by vernier to six minutes of arc. A small bubble level is mounted on the sighting tube. The inscription reads "W. M. WELCH SCIENTIFIC COMPANY (/) WELCH (/) ESTABLISHED 1880 (/) 1515 SEDGWICK ST. CHICAGO. U.S.A."
Ref: W. M. Welch Scientific Company, Catalog. Scientific Apparatus (Chicago, 1929-1963).
W. M. Welch Scientific Company, "Instructions for the Use of No. 3536 Sextant Model."
Location:
Currently not on view
See more items in:
Medicine and Science: Physical Sciences
Navigation
Data Source:
National Museum of American History, Kenneth E. Behring Center
Visitor Tag(s):

Welch duo-seal digest : vacuum technology

Welch digestVacuum technology
Author:
W.M. Welch Manufacturing Company
Welch Scientific Company
Physical description:
v. : ill. ; 28 cm
Type:
Periodicals
Date:
19uu
Topic:
Vacuum technology--Periodicals
Scientific apparatus and instruments--Periodicals
Call number:
TJ940 .W438
Notes:
Description based on: Vol. 3, no. 4 (1960) and v. 4, no. 1 (1961); title from caption
Data Source:
Smithsonian Libraries
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