655 



und meiner theoretischen Anschauungsweisen hatte" weise ich ent- 

 schieden zurück. 



Für den unbeteiligten Leser möchte ich zur Beleuchtung von 

 Heidenhain's Behauptungen nur noch bemerken, daß meine „Zellen- 

 studien" bereits im März 1895 fertig niedergeschrieben waren, und daß 

 ich vor ihrer Drucklegung (Absendung 24. Mai) keine Kenntnis von 

 Heidenhain's „Cytomechanischen Studien" (erschienen am 23. April 1895) 

 hatte, sondern erst viel später Einsicht in diese Arbeit bekam. 



Für mich ist diese Angelegenheit hiermit erledigt. 



Dr. Niessing. 



Desgleichen für den Anatomischen Anzeiger, welcher persönliche 

 Polemik principiell ausschließt. B. 



New York Academy of Science. 



Biological Section. 

 January 13th, 1896. 



The papers presented were: G. S. Huntington "On the Visceral 

 Anatomy of the Edentates". The characters of the brain, alimen- 

 tary, respiratory and genito- urinary tracts were especially considered. 

 The following forms were discussed: — Myrmecophaga jubata, 

 Tamandua bivittata, Arc to pi the cus didactylus, Dasypus 

 sexcinctus, Tatusianovemcincta, Manis longicaudata. In 

 the brain characters the following features were considered: — the trans- 

 verse frontal sulcus; the great longitudinal fissure, and the absence of a 

 distinct Sylvian fissure. In the alimentary tract the Sloths are to be 

 sharply separated from the remaining groups, the stomach structure with 

 its pyloric gizzard notably aberrant: the ileo- colic junction is traced 

 throughout the Edentates in a well marked series of transitional forms. 



0. S. Strong "On the Use of Formalin in Injecting Media". 

 The paper made especial note of the advantages possessed by this preser- 

 vative in injecting the brain in situ. Formalin (40 *'/(, formaldehyde) 

 diluted with an equal volume of water is injected into the cephalic vessels 

 until it runs from the cut jugulars. After a few minutes the same quan- 

 tity is again injected and once or twice again after an elapse of fifteen 

 to twenty minutes. The brain is then removed and will be found to be 

 completely fixed throughout. The swelling usually noticed in formalin 

 hardened brains does not appear to take place when this method is em- 

 ployed. Besides the many general advantages of fixing brains by injection, 

 formalin has the especially merit of giving them the best consistency for 

 macroscopic work, and further such brains are available subsequently for 

 the GoLGi and Weigert methods as well as, possibly, for cytological me- 

 thods. Formalin also has the advantage that it can be used, as above, 

 stronger than is necessary for fixation and thus allowance made for its 



