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Dates
1925
1950
1925-1950
Collection
University Health Network - Academy of Medicine Collection
Category
Diagnostic & Treatment Artifacts
Classification
Optometry
Accession Number
1987.1.2 a-c
Description
Optometer (a) with a wooden handle, metal eyepiece, sliding visual test chart mounted on a calibrated wooden rod; accompanied by a pink card (b), printed and calibrated, two pieces that interlock at the temple; a blank form (c) for ordering corrective lenses based on tests and measurements made usi…
  1 image  
Accession Number
1987.1.2 a-c
Collection
University Health Network - Academy of Medicine Collection
Category
Diagnostic & Treatment Artifacts
Classification
Optometry
MeSH Heading
Vision Tests
Optometry
Description
Optometer (a) with a wooden handle, metal eyepiece, sliding visual test chart mounted on a calibrated wooden rod; accompanied by a pink card (b), printed and calibrated, two pieces that interlock at the temple; a blank form (c) for ordering corrective lenses based on tests and measurements made using (a) and (b).
Number Of Parts
3
Part Names
a - optometer - Size: Length 33.5 cm
b - eye measure - Size: Length 15.0 cm
c - order form - Size: Length 28.0 cm x Width 21.6 cm
Provenance
Acquired from the Academy of Medicine; source: Dr. T. Porter; used by his grandfather, James Mason, in Listowel.
Site Made (Country)
Canada / USA
Dates
1925
1950
1925-1950
Material
paper; pink; yellow
wood: brown
metal: silver
Permanent Location
Storage Room 0010
0010-E4-10
Condition Remarks
Worn.
Copy Type
Original
Reference Types
JPG
Reference Comments
CD #UHN
Research Facts
It was illegal for optometrists to use optometers after 1919, but they were frequently given away by mail order companies with the spectacle order forms.
Images
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dental crown stretcher

https://mhc.andornot.com/en/permalink/artifact13300
Dates
1930
1960
circa 1930-1960
Collection
Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Diagnostic & Treatment Artifacts
Classification
Dental
Accession Number
010020178
Description
Silver metal dental crown stretcher; two handles, curved inward, end with flat, circular discs that lie flat against each other at top of instrument; five pairs of knobs bolted over edges of discs; knobs all have different shapes but are generally rounded; pairs open and close when handles are move…
  2 images  
Accession Number
010020178
Collection
Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Diagnostic & Treatment Artifacts
Classification
Dental
MeSH Heading
Dental Instruments
Dentistry, Operative -- instrumentation
Description
Silver metal dental crown stretcher; two handles, curved inward, end with flat, circular discs that lie flat against each other at top of instrument; five pairs of knobs bolted over edges of discs; knobs all have different shapes but are generally rounded; pairs open and close when handles are moved inward and outward; screw between handles can widen or shorten the amount of space in between pairs of knobs; yellow adhesive around one handle.
Number Of Parts
1
Provenance
Transfer from the Dental Canada Fund; previously housed in the Dentistry Canada Museum (Ottawa)
Maker
Densco
Site Made (City)
Denver
Site Made (State)
Colorado
Site Made (Country)
United States of America
Dates
1930
1960
circa 1930-1960
Date Remarks
Based on similar items
Material
metal: silver
rubber: yellow
Inscriptions
Engraved on front: "DENSCO // DENVER"
Permanent Location
Storage Room 0010
0010-B
Dimension Notes
Length 16.9 cm x Width 7.1 cm x Depth 0.7 cm
Condition Remarks
Metal very slightly tarnished; yellow tape around one handle
Copy Type
Original
Reference Types
Other
JPG
Reference Comments
010020176; 010020177
CD #10
Research Facts
Dr Ralph and Mrs Olga Crawford donated their extensive Canadian dental collection to the DCF to create the museum in 1997; further donations were received while Dr Crawford was Curator Emeritus at the Dental Canada Museum until its closure in 2008; this item was donated by Dr. Dennis Smith from Winnipeg, Manitoba, who described the item as a crown stretcher
Images
Less detail