Excerpt from The Boston Medical and Surgical Journal, Vol. 183: July 15, 1920 Case 4. Male. Age, 31 years. Admitted to Mt. Sinai Hospital July, 1919. History of five weeks' duration of left lumbar pain, radiating to thigh, accompanied by urinary frequency. Physical Examination negative. Kidneys not palpable. X-ray of urinary tract negative. Cystoscopy showed a normal bladder with nor mal ureteral orifices. Right ureter catheter ized; clear urine; good indigo carmine in twelve minutes. Obstruction encountered in left ureter at cm.; cloudy urine obtained with weak indigo carmine concentration in twenty minutes. A second x-ray was also nega tive: despite this fact, a tentative diagnosis of a calculus impacted at the uretero-pelvic junc tion was made. This was confirmed by passing a wax-tipped bougie, and obtaining positive scratch marks. Five days later the patient passed a smooth yellowish stone, the size of a large cherry pit. Analysis of the calculus showed it was composed chiefly of ammonium urates. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.