734 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Method of Demonstrating Spirochaeta pallida in the Blood.* — 

 P. Eavaut and A. Ponselle take 30 c.cm. of distilled water in a test tube 

 and add thereto 30 drops of the blood drop by drop. In about 3 hours 

 a fibrinous clot entangling the white corpuscles and micro-organisms 

 will have formed. The clot is withdrawn, washed several times to free 

 it from any red corpuscles, rolled on filter-paper to remove superfluous 

 water, then imbedded, sectioned, and stained by Levaditi's method. 



In this way the writers found SpiroclmtcB in every section examined. 



(3) Cutting 1 , including- Imbedding and Microtomes. 



Cathcart-Darlaston Microtome. — This instrument, made by Watson 

 and Sons, contains an addition to the ordinary well known Cathcart 



Microtome, consisting of an arrangement whereby the material to be cut 

 is automatically raised (fig. 84). Two vertical forks, A A, are attached 

 to the knife carriage, and as the latter is moved forward one of these 

 forks catches an arm attached to the milled head below, thereby carrying 

 a pawl the distance necessary to engage any desired number of teeth, 

 according to the distance apart at which the two forks have been set. 



* Gazette des Hopitaux, 1906, p. 1023. See also Medical Review, ix. (1906) 

 p. 517. 



