A set of eleven plaster models mounted on narrow metal pillars set on square wooden bases. Each model represents a stage in the development of the chicken embryo. The models are brightly painted in contrasting colours.
It is unclear whether the models represent a complete set, or whether this set has been made up of a single set of models. The set is likely complete as two additional sets of this kind, 2023.zoo.86.1-6 and 2023.zoo.87.1-6 contain the same number of models.
2023.zoo.85.1: A semispherical model painted yellow. The yellow flattened face is textured. A small area at the top of the model is painted in a cream colour.
The following is written in pencil on a white adhesive label on the wooden base: “Chick I”
The following is written in black marker on the wooden base: “I”
This model retains its original metal Mueller-Ward label, over which a piece of clear tape has been placed. The metal label includes a smaller white paper label upon which the following numeral is printed: “IJ”. Below this is written: “COPY R 1941”
2023.zoo.85.2: A rectangular model in yellow and white. The semicircular spot is painted in white and is textured. The side of this semicircular spot has a small void.
The following is written in pencil on a white adhesive label on the wooden base: “Chick II”
The following is written in black marker on the wooden base: “III”
This model retains its original metal Mueller-Ward label, over which a piece of clear tape has been placed. The metal label includes a smaller white paper label upon which the following numeral is printed: “IIIJ”. Below this is written: “COPY R 1941”
2023.zoo.85.3: A rectangular model in primarily in yellow with a semicircular area at its centre that is painted in several colours. There are a series of directional arrows on the coloured face. The side of this semicircular spot has a small void.
The following is written in pencil on a white adhesive label on the wooden base: “Chick III”
This model retains its original metal Mueller-Ward label, over which a piece of clear tape has been placed. The metal label is missing its white paper inset.
2023.zoo.85.4: A colourful model with a tapered disk-like form. The back portion of the model is grey.
The following is written in pencil on a white adhesive label on the wooden base: “Chick IV”
This model retains its original metal Mueller-Ward label, over which a piece of clear tape has been placed. The metal label includes a smaller white paper label.
2023.zoo.85.5: A colourful model with a tapered disk-like form. The coloured face is similar to 2023.zoo.85.4, but flatter in profile. There are a series of directional arrows on the coloured face. The back portion of the model is grey.
The following is written in pencil on a white adhesive label on the wooden base: “Chick V”
This model retains its original metal Mueller-Ward label, over which a piece of clear tape has been placed. The metal label includes a smaller white paper label upon which the following numeral is printed: “VVa”. Below this is written: “COPY R 1941”
2023.zoo.85.6: A colourful model with a tapered disk-like form. The coloured face is similar to 2023.zoo.85.5, but the colours are brighter. There are a series of directional arrows on the coloured face. The back portion of the model is grey.
The following is written in pencil on a white adhesive label on the wooden base: “Chick VI”
The metal Mueller-Ward label is missing.
Accession Number: 2023.zoo.85.1-6
Alternative Name:
Primary Materials: Plaster, Wood.
Markings:
Dimensions of the square base= 10 x 10, Maximum width of these models is 15. Maximum height is 23.
These models represent the stages of embryological development of the chicken embryo, an organism commonly used in biological instruction.
The paint of most of the models has been chipped with use, especially around exposed edges. It is not clear whether this set is complete.
Associated Instruments:
Ward’s Natural Science Establishment, Inc., Rochester, NY.
Date of Manufacture: Mid 20th Century.
These models were used at the Department of Zoology (now part of the Department of Ecology & Evolutionary Biology and the Department of Cell & Systems Biology).
The models were photographed and catalogued on Feb 6, 2023. They remain at the Department of Ecology & Evolutionary Biology.
Additional models of this type are located in the EEB teaching lab, so the sets catalogued here may be incomplete.
A brief biography of Justus F. Mueller (1902-1993), the developer of the models, can be found at New York Heritage Digital Collections, along with information on his personal papers at SUNY Upstate Medical University – Health Sciences Library. (Archived February 13, 2023).
Some relevant digitized catalogues can be found at “The Ward Project” website that is run by the University of Rochester. (Accessed March 7, 2023)
A brief history of Ward’s Natural Science Establishment, Inc., which produced the models, can be found at the River Campus Libraries of the University of Rochester. This archive holds the company’s papers. (Archived February 13, 2023).
The models in this collection were developed by Justus F. Mueller (1902-1993), an American parasitologist educated in both art and zoology. Following his graduate research at the University of Illinois, Mueller took a position at the New York State College of Forestry (now SUNY College of Environmental Science and Forestry) in Syracuse, New York in 1929. While at the College of Forestry, he partnered with Ward’s Natural Science Establishment, Inc. to create 16 sets of zoological models comprising 116 models.
Ward’s Natural Science Establishment was founded in 1862 by Henry Augustus Ward (1834-1906). The company supplied natural science materials to museums. In 1928, the Ward family donated the company to the University of Rochester. The company began to flourish in the 1940s and was sold to Dean L. Gamble, its president, and Frank Hawley Ward in 1940. The company became very successful during the expansion of science education in the early Cold War Period.