•THEAICR^COPE 





Vol. XI. 



TRENTON, N. J., JULY, 1891. 



No. 7. 



ORIGIMAL 

 C°AA\VMICATIoriS 



THE SO-CALLED MIGRATING CELLS OF THE 

 CORNEA. 



(with plate II.) 



C. HEITZMAXX, M. D. 



IN the seventh decade of our century von Recklinghausen, 

 now professor of morbid anatomy at the University in 

 Strassburg, and Max Schultze, late professor of zoology at the 

 University in Bonn, made wonderful discoveries concerning the 

 mobility of the " cells " of warm blooded animals. Von Reck- 

 linghausen first constructed a moist chamber, in which, evapor- 

 ation being prevented, the living cells could be seen to execute 

 amceboid form-changes and locomotion ; Max Schultze invented 

 the so-called heated stage, on which the temperature could be 

 raised at random, greatly facilitating the observation of locomo- 

 tion under the microscope. A score of investigations afterward 

 corroborated the statements of these two excellent microscopists. 

 Von Recklinghausen also was the first to assert that in the 

 freshly excised cornea of the frog and of a number of warm 

 blooded animals, if the cornea be placed in the aqueous humor, 

 the liquid filling the anterior chamber of the eye, migrating 



