Admitting that he has not written a complete treatise on pneumoconiosis, Dr. Pendergrass has collected his thoughts on certain aspects of the problem which have interested him. On these topics, he gives us much valuable information. As a radiologist, his knowledge and interest have been unique. The roentgenologic manifestations of pneumoconiosis are dealt with in length and detail. The difficulties and deficiencies in radiographic diagnosis are discussed, and classifications are advanced and criticized. Problems of high clinical import, such as the relationship between pneumoconiosis and other lung disease—notably, tuberculosis, the assessing of disability, the correlation of x-ray appearance with lung function, and the modifications in the radiograph during the life history of the disease, are also well covered. No mention, however, is made of the lung lines described by British writers as occurring from lymphatic blockage in pneumoconiosis.
Pneumoconiosis is a problem of importance, but we can not agree to