1895.] MICROSCOPICAL JOURNAL. 327 



cases mentioned above, 36 were complicated with croup, and 

 only ?> of these were free from Loeffler's bacillus. Dr. Thymann 

 gives an interesting account of four brothers and sisters infected 

 at the same time and in whom the bacilli found in all four 

 cases were exactly alike, while the clinical appearance of the 

 d'sease differed in all four. 



The Savages Are, Unconsciously, Bacteriologists. — M. 



Dantec has demonstrated that the arrow poison used by the 

 natives of the New Hebrides contains neither serpent venom 

 nor vegetable extract. It contains two deadly disease germs — 

 the vibrion se^jtique, which causes that form of blood poisoning 

 known as malignant edema, destroying life in from twelve to 

 fifteen hours if still alive, and the bacillus of tetanus, which if 

 the former poison prove inert, will finish uj) the unlucky vic- 

 tim in a much longer time. The poison is obtained from the 

 earth in certain marsh}' places. The horse cannot be the origin 

 of the tetanus germ, as that animal is unknown in that entire 

 group of islands. 



MEDICAL MICROSCOPY. 



Diagnosis of a Tumor by Blood Examination. — Note 

 from a Clinic by Dr. N. Senn. In the present case I can out- 

 line a tumor with rounded, lobulated margins, that I can 

 push forward and upward, the dullness extending by thespleen. 

 Having located the tumor we shall attempt to recognize its 

 nature by a very careful examination of the blood. We locate 

 the tumor anatomatically with precision by resorting to in- 

 sufflation of air per rectum, which pushes the tumor upward 

 and outwarJ, showing conclusively that it is an intra-abdomi- 

 nal tumor. The g'^neral appearance of the patient already 

 indicates that this splenic svvelling has interfered with the 

 process of hiematogensis. It points to a serious affection of at 

 least one of the principal blood-producing organs. I wish to 

 show under the microscope the blood of this patient, which h s 

 been subjected to a staining process recently devised for recog- 

 nizing certain patholigical conditions of the bl )od, namely, with 

 eusin. Under the microscope can be seen the eosino|)hilous 

 leucocytes, or cells. And you will find the white corpuscles, 

 or leucocyt's, in the proportion of about 25 per cent; or one 



