This is the unique number assigned to each establishment.
An establishment is ideally defined as an economic unit, which engages under a single ownership or control, in one or predominantly one kind of economic activity at a single physical location: for example mine, factory workshop. For the censuses of manufacturing establishments, a manufacturing establishment is thus one predominantly engaged in manufacturing activity /activities.
All manufacturing establishments engaging 10 or more persons
This field (Form number) was not filled by the enumerator during the field operation. Continuous numbers were assigned before the data entry.