text: This type of extensive calcification within the lungs was first described by Harbitz (1918). The name "mikrolithiasis alveolaris pulmonum " was suggested first by Puhr (1933). Sosman, Dodd, Jones, and Pillmore (1957) have recently reviewed the literature on 22 previously reported cases (20 proved, two probable) and have described 23 new ones emphasizing the familial occurrence of the condition. Since their report further cases have been described by Gilsanz, Palacios, and Alonso Barrera (1956), Biressi and Casassa (1956), Finkbiner, Decker, and Cooper (1957), Greenberg (1957), and Chinachoti and Tangchai (1957).