1886.] 



MICEOSCOPICAL JOURNAL. 



13 



hens, and especially in foreign tur- 

 keys of the family Phasania. He 

 says that these acari gather in mil- 

 lions in the cellular tissue and de- 

 stroy the fibres, but without causing 

 any other change than the production 

 of the calcareous concretions spoken 

 of. He further says : ' They have 

 been noticed in such numbers in old 

 birds as to leave no doubt as to their 

 being the cause of death.' The exist- 

 ence of either of the mites above 

 described, in American fowls, has 

 not hitherto been known. 



From the results of these examina- 

 tions, it seems probable that a con- 

 siderable amount of disease prevail- 

 ing among American domestic 

 fowls, and not referable to any 

 known type, may be due to the 

 presence of such parasites as I found 

 in the cases above mentioned. In- 

 vestigations in this direction may 

 therefore have an important bearing 

 on the healthful raising of domestic 

 fowls. 



Staining Tissues in Microscopy. — 



yii. 



BY PROF. HANS GIERKE. 

 \_Conti7iucd from p. 2j6, vol. rv'.] 



140. Adler. Vorlaufige Mittheilung 



iiber eine mit Silberimbibition 



gemachte B e o b a c h t u n sf . 



Zeitschr. f. rat. Med. 3, Reihe, 



xxi, 160. 

 The net-like figures that appear on 

 epithelium after treatment by silver 

 nitrate are considered to be fibres 

 similar to elastic tissue. 



141. Brouefi' und Eberth. Zur 



Kenntuiss der Epithelien. 

 Wiirzb. naturwiss. Zeitschr. 



V, p. 34- 

 These authors confirm v. Reckling- 

 hausen's treatment of epithelium. 

 The silver salt is precipitated in the 

 cementing substance between the cells. 



142. Harpeck. Ueber die Bedeutung 



der nach Silber impriignation 

 auftrctenden weissen liicken 

 und spaltahulichen Figuren 

 in der Cornea. Arch. f. 



Anat. 1864. Heft. 3, p. 232. 

 and 



143. Hartmann. Ueber die durch 



den Gebrauch der Hollen- 

 steinlosung kiinstlich darges- 

 tellten Lymphgefassanhiinge, 

 Saftkaniilchen u n d epithel- 

 ahnlichen Bildungen. 1. c, 



P- 235- 

 Both authors explain the appear- 

 ances in the cornea in epithelial and 

 connective tissue, after impregnation 

 with silver, as fallacious indications 

 of tissue elements, being merely the 

 result of artificial treatment. The 

 first thinks that in manipulating the 

 cornea cracks are produced that fill 

 with the silver precipitate. The 

 second considers the network of lines 

 between the endothelial cells as a 

 peculiar, form of precipitate, result- 

 ing from the comlaination of the sil- 

 ver with the constituents of organic 

 tissue, albimii nates, and alkaline 

 chlorides. 



144. His. Ueber ein perivasculiires 



Kanalsystem in den nervosen 

 Centralorganen und liber des- 

 sen Beziehungen zu dem 

 L y m p h s y s t e m . Zeitschr. 

 Wiss. Zool. , XV, 137. 

 His adheres to his previous state- 

 ments. 



145. Auerbach. Tageblatt der 40. 



Versamml. deutsch Naturf. u. 



Aerzte No. 6 ; 

 Untersuchunge n iiber Blut 



und Lymphgefiisse. Arch. f. 



path. Anat., xxiii, 340. 

 Auerbach does not believe in v. 

 Recklinghausen's cement substance, 

 but thinks the black lines result from 

 combinations of the silver salt with 

 albuminous substances and with so- 

 dium chloride deposited in accidental 

 grooves on the epithelium. 



146. Henle. Bericht iiber die 



Fortschritte der Anatomic im 

 Jahre 1866. Zeitschr. f. rat. 

 Med. 3. Reihe. xxx Heft i, 

 p. 6. ' 

 Henle confirms Auerbach's views. 



147. Hiiter. Zur Pathologic der 



Gelenkflachen u n d Gelenk- 



