1896.] MICHOSCOPICAL JOURNAL. Ill 



Dr. Ward exhibited slides of DoUolum, one of the Tanicates. 

 Mr. Clements showed a modification of the Schultze dehy- 

 drating apparatus. Roscoe Pound, 



Secretary. 



NEW PUBLICATIONS. 



Immunity protective inoculation in infectious diseases 

 and serum-therapy. — 325 pp. New York; Wm. Wood & Co, 

 1895. 



Dr. Sternberg is well known as an author on bacteriological 

 subjects. This new work bears out the reputation of the author 

 as a close student of literature and as an observer as to practical 

 details. The volume is indeed timely for so much has been 

 written on the subject of serum-therapy and antitoxins, so much 

 of the literature is scattered, and much of it will not bear close 

 scrutiny. Dr. Sternberg has done well in sifting the matter 

 thoroughly and giving the practitioner reliable data, which he 

 may use in practice. 



He considers first the subject of natural immunity, and all 

 students will agree with him when he says "No questions in 

 general biology are more interesting, or more important from 

 a practical point of view than those which relate to the suscep- 

 tibility of certain animals to the pathogenic action of certain 

 species of bacteria, and the immunity, natural or acquired, from 

 such pathogenic action which is possessed in other animals." 

 The following facts are set down, that young animals are more 

 susceptible than older ones, race immunity — in the immune 

 animal, multiplication does not occur, or is restricted to a 

 local invasion of limited extent, and in which after a time the 

 resource of nature suffice to destroy the parasitic invader. 



These "resources of nature" upon which natural immunity 

 depends are available for the prevention of infection but they 

 may be neutralized by various agencies. Naturally immune ani- 

 mals maybe infected by adding certain substances to pathogeuic 

 bacteria. Natural immunity may be explained — first Phago- 

 cytosis; second, action of blood serum and other organic liquids 

 upon bacteria. Acquired immunity may depend on the develop- 

 ment of antitoxins in the body of the immune animal. There 



