02 Mr. W. S. Lazarus-Burlow. The Pathology of [.Ian. 16, 



at first external and then ventral to the motor portion of the internal 

 capsule, and so reaches the tegmentnm. The lines from the two sides 

 meet in the interpeduncular grey matter at the level of and just 

 behind the exit of the 3rd nerve. 



2. Hyperinspiratary Clonus ("snuffing movements"). This effect 

 was obtained by excitation at the junction of the olfactory bulb and 

 tract, and then carrying the stimulation backwards along the olfactory 

 tract ; the same result was found when the uncinate convolution of 

 the temporo-sphenoidal lobe was irritated. Followed from the uncus 

 this excitable region passed behind the optic tract to the cms, and 

 then lay ventrally to the crusta. The excitable tract on each side 

 thus converged towards the middle line at the upper border of the 

 pons. 



3. Hyper inspiratory Tonus. This experimental result is of such 

 frequency and constancy as to be clearly an important general 

 phenomenon. It can be elicited in various ways : e.g., excitation of 

 the descending motor tract in the corona radiata and internal capsule 

 yielded this result ; so did excitation of the 5th nerve and dura mater, 

 as well as the sciatic nerve, both before and after complete removal 

 of the cerebrum at the tentorium cerebelli. 



The author finds medullated fibres in prepared microscopical 

 vertical (frontal) sections of the brain running in the same course as 

 that indicated by faradic excitation of the living surface of the 

 section of the hemisphere. For his conclusions he has relied solely 

 upon tracings of the respiratory movements. Fifty-six tracings are 

 included as illustrations, together with thirty photographs of brains 

 and brain sections to show the precise points excited. The author 

 records his thanks to Mr. Horsley for help, and to Dr. Howard Tooth 

 for the loan of excellently-prepared sections. 



IV. " The Pathology of the (Edema which accompanies Passive 

 Congestion." By WALTER S. LAZARUS-BARLOW, M.B., 

 M.R.C.P. Communicated by Professor ROY, F.R.S. Re- 

 ceived December 22, 1893. 



(From the Pathological Laboratory, Cambridge.) 

 (Abstract.) 



The author reviews the literature of the subject, and points out 

 that the question of time has not been sufficiently considered by 

 previous investigators. 



He examines the view which, at present, is usually accepted, and 

 which explains the oedema accompanying passive congestion upon 

 purely mechanical principles. 



