Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Tools and Equipment (hierarchy name)
5. equipment
6. [equipment by profession or discipline]
7. [equipment for science and technology]
8. scientific instruments
9. biological sciences equipment

Anotations

Scope note:

Devices, dating from the 19th century, that were used in place of dissecting knives; operators would breathe into the blowpipes to inflate and scrutinize parts. The pipes were outfitted with valves that would prevent the backflow of unwanted air or bacteria into the pipes.