This device consists of a brass cylinder with capsule. Above the opening in this capsule is ...

Measurement: Sensory (auditory) perception. Instrument for determining the discrimination threshold of the pitch. Physical description: This device ...

The albumin meter was used to test the level of the protein albumin in urine. The ...

The albumin meter was used to test the level of the protein albumin in urine. The ...

Ovalen medaillon met een voorstelling van de Annunciatie aan Maria. Een deel van de voorstelling, met ...