Prof. L. Hill. [Jan. L>:>, 



W:inlle (T.) On the Relation of Design to such Craft Teaching as 

 niav be undertaken by Technical Schools. 4to. Manchester 



The Author. 



Photogravure Portrait of Professor Michael Foster, Sec. R.S., after 

 a painting by H. Herkomer, R.A. 



The Subscribers to the Foster Portrait Fund, 



Trinity College, Cambridge. 



January 25, 1894. 



Sir JOHN EVANS, K.C.B., D.C.L., LL.D., Vice-President and 

 Treasurer, in the Chair. 



A List of the Presents received was laid on the table, and thanks 

 ordered for them. 



The following Papers were read : 



I. "On Intra-cranial Pressure. Preliminary Note." By 

 LEONARD HILL, M.B., Assistant Professor of Physiology, 

 University College, London. Communicated by Professor 

 BURDON SANDERSON, F.R.S. Received November 16, 1893. 



(From the Physiological Laboratories of Oxford and University College.) 



My purpose in the following note is to submit to the Royal Society 

 the results of experiments, made during the past year, relating to the 

 " intra-cranial pressure " (i.e., the pressure to which the brain is 

 normally exposed in the cranial cavity), and the changes which can 

 be produced in it by alterations of the form and diminution of the 

 capacity of the cranial cavity. 



The experiments were undertaken at the suggestion of Professor 

 Bin-dun Sanderson, and have been carried out with his help and 

 criticism. 



The animals employed were cats or dogs. Ether, chloroform, and 

 morphia were used as anaesthetics. 



Methods of Research. 



Methods of Producing Alterations of Pressure within the Subdural 

 Space. 



. The skull is trephined in the parietal region, the dura mater 

 freely divided, tlie trephine hole " wormed " with an ordinary 



