any instrument used to measure the size and number of dust particles per unit volume in the atmosphere. Also called nucleus counter .
[ 1890-95 ]
any instrument used to measure the size and number of dust particles per unit volume in the atmosphere. Also called nucleus counter .
[ 1890-95 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012