artefacts: 33076
This data as json
| rowid | artifactNumber | ObjectName | GeneralDescription | model | SerialNumber | Manufacturer | ManuCountry | ManuProvince | ManuCity | BeginDate | EndDate | date_qualifier | patent | NumberOfComponents | ArtifactFinish | ContextCanada | ContextFunction | ContextTechnical | group1 | category1 | subcategory1 | group2 | category2 | subcategory2 | group3 | category3 | subcategory3 | material | Length | Width | Height | Thickness | Weight | Diameter | image | thumbnail | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 33076 | 1982.0405.001 | Comparator | METAL - PROB. BRASS & STEEL? | Unknown | England | 1874 | circa | 1 | BASE PAINTED GREY | USED AT INTERVALS FOR THE STATUATORY COMPARISON OF THE STANDARD DOMINION YARD WITH ITS PARLIAMENTARY COPIES IN CANADA BUT WAS SUPERCEDED BY OTHER DEVICES. WAS PRESERVED FOR MANY YEARS MR. E.O.WAY DIRECTOR WEIGHTS & MEASURES UNTIL HANDED OVER TO NRC IN 1934. SEE ADDITIONAL INFO. IN SUPP. INFO. FILE. | USED TO COMPARE THE DOMINION STANDARD YARD WITH ITS PARLIAMENTARY COPIES [THE STANDARD 'B' COPY IS CATALOGUED AS PART OF THE NMSTC COLLECTION AS 880251]. | DURING COMPARISONS THE BARS WERE SUPPORTED ON EQUALIZING FRAMES CONTAINING EIGHT ROLLERS. THE MICROSCOPE BEAM IS OF SLATE AND OIL LAMPS WERE USED TO ILLUMINATE THE FIELDS WITH THE AID OF PIERCED RIGHT-ANGLED PRISMS. [REF 1] | Metrology | Precision tools | metal->brass;metal->steel - possible | 98 | 64.5 | 27.2 | http://source.techno-science.ca/artifacts-artefacts/images/1982.0405.001.aa.cs.png | http://source.techno-science.ca/artifacts-artefacts/images/1982.0405.001.aa.cs.thumb.png |
