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What was where and do we have images

There was neither electricity nor hygrometers to measure the humidity in the air

Drop the magnetic stirring rod into the jar and switch on the stirring plate to activate it

Leukoplakia describes a whitish patch or plaque that cannot be characterized clinically or pathologically as any other disease and it is not associated with any physical or chemical causative agent except the use of tobacco.[2] Unlike smokers, who experience widespread periodontal destruction, the most prevalent effects of ST are localized to the site of placement, in the form of gingival recession and white mucosal lesions

Friedmann, I., Dahdouh, E