N. MATERIA MEDICA, THERAPEUTICS, AND HYGIENE. 507 



face these filaments give rise to minute rounded spores, which 

 have also been seen by other observers, and recognized as 

 special "corpuscules" of the diseases small -pox and vac- 

 cinia. In investigating the phenomena of typhoid fever, he 

 has ascertained that in the ulcerated intestines there are im- 

 mense numbers of minute, round, yellowish-green organisms, 

 both in the tissues of the intestinal wall and in the villi of 

 the surface. 15 A, Oct, 31, 1874, 580. 



DANGER OF EATING FISH IMPROPERLY CURED, OR CAUGHT 

 IMMEDIATELY AFTER THE SPAWNING SEASON. 



The importance of the exercise of suitable care in regard 

 to public fisheries may be appreciated from the fact, now 

 quite well established, that the consumption of fish improp- 

 erly cured, or taken during the exhaustion following the 

 spawning season, produces serious evils, these, among others, 

 consisting in part of a modified form of leprosy and elephan- 

 tiasis diseases directly traceable to the cause referred to 

 both in Norway and in India. 12 A, Dec. 31, 1874, 175. 



SELECTION OF THE WATER SUPPLY OF CITIES. 



A valuable report by Professor Chandler upon the san- 

 itary chemistry of waters, and suggestions with regard to 

 the selection of the water supply of towns and cities, has 

 just been reprinted from papers of the American Public 

 Health Association, the whole forming an important manual 

 in connection with the plans of water supply for towns and 

 cities. 



Professor Chandler in this report considers the nature of 

 the impurities contained in water and their effect upon the 

 public health, and devotes particular attention to the pollu- 

 tion of streams by the refuse from factories and by sewage. 

 He is, however, quite satisfied that a certain class of impu- 

 rities, especially those of an animal nature, in time become 

 harmless by their decay, consequent upon their combination 

 with the oxygen in running waters ; this relief, however, not 

 applying to the case of confined wells. The experiences of 

 the Thames coincide with those of the Hudson in this re- 

 spect. 



It has been calculated that sewage mixed with twenty 

 times its volume of running water, after flowing a distance 



