QUARTERLY CHRONICLE OF MICROSCOPICAL 

 SCIENCE. 



HISTOLOGY. 



II, The Cell.^ 1. Action of Quinine on Leucocytes. — Some 

 years ago, Binz showed that quinine arrests the motions 

 of the white blood-corpuscles, and this effect is now explained 

 by the diminution in the oxidizing power of the red corpuscles 

 which the drug produces. The Avhite corpuscles are only 

 active when they are supplied with oxygen, and their move- 

 ments are arrested by want of it. On this account they can 

 only creep through the walls of the blood-vessels when oxy- 

 gen is supplied to them by the red ones as they pass by. 

 When no red corpuscles are present, Binz has found that the 

 white ones cease to Avander altogether ; and this observation 

 has also been made by Heller and Zahn (Binz, ' Archiv fiir 

 Experiment Pathologic,' vol. i ; ' London Medical Record,' 

 1873, p. 308). 



2. Contractility of cells.— Kosch ('Pfluger's Archiv,' 1873, 

 vol. vii, p. 515-521) has observed the contractility of carti- 

 lage-cells under the influence of the induced current, as 

 described by Heidenhain and Rollett, in the hyaline cartilage 

 of the frog and newt. Similar phenomena are seen in the 

 corneal corpuscles. Both, he thinks, may be explained by 

 the thermic action of the current, since the same appearances 

 are seen under the influence of heat or merely after death. 

 This explanation applies Avith less certainty to the newt than 

 to the frog. 



3. Dr. HoUis ('Journal of Anat. and Phys.,' November, 

 1873, p. 120) continues his researches on " Tissue metabo- 

 lism," or the artificial induction of structural changes in 

 living organisms. 



' The articles in this division are arranged under the following heads : — 

 1. Text-books and Technical Methods. TI. The Cellin General. HI. Blood. 

 IV. Epithelium. V. Connective Tissues. VI. Muscle. VII. Nervous 

 System. VIII. Organs of Sense. IX. Vascular System. X. Digestive 

 Organs and Glands. XI. Skin and Hair. XII. Urinary and Sexual 

 Organs. 



