348 Dr. Thomson, Mr. Hill, and Dr. Halliburton. 



1. Patient sitting quietly without straining. In five minutes 

 23 minims (1-357 c.c.) were collected. 



2. Patient sitting and straining. In five minutes 35 minims 

 (1-965 c.c.) were collected. 



3. Patient sitting quietly. In five successive minutes the amounts 

 collected were, respectively, 8, 7, 5, 5, 5 drops. The total measured 

 19 minims (1-021 c.c.). 



4. Subsequent to this, five minutes were occupied by the patient in 

 straining, and the amounts collected in consecutive minutes were 12, 

 10, 8, 9, and 10 drops respectively. The total measured 33 minims 

 (1-947 c.c.). 



5. Patient lying down and not straining. The drops fell as follows 

 in five consecutive minutes 9, 6, 5, 5, and 5, and the total measured 

 27 minims (1*593 c.c.). Here the arterial pressure was probably not 

 decreased owing to mental excitement, while the cerebral venous pres- 

 sure was increased. 



6. Patient lying flat on the stomach and head hanging over the end 

 of a sofa. The drops fell as follows in five consecutive minutes, 8, 7, 

 6, 7, and 7. The total measured 28 minims (1-652 c.c.). 



7. Finally, after the last experiment, the following was collected 

 during quiet dropping, while the patient was sitting with the head 

 forward. The drops fell as follows : 5, 4, 4, 4, and 4, in five successive 

 minutes ; and the total measured 15 minims (0-885 c.c.). 



The following is the report on the chemical examination of the 

 fluids : 



So far as the small quantities available admit of analysis, the fluids 

 are the same qualitatively. The liquid which escaped passively, and 

 that which passed under straining, both contained a small quantity of 

 organic and inorganic solids. Among the organic substances present 

 are the reducing substance and a trace of proteid. Judged by the 

 amount of precipitate produced by alcohol in equal amounts of the 

 two fluids, the proteid is less abundant in the fluid passed during 

 straining, but the amount is too small to weigh. 



Determination of the total solids gave the following results, expressed 

 in percentages : 



A. The fluid passed passively, 1*1 per cent. 



B. The fluid passed during straining, 0*43 per cent. 



Even the higher of these numbers is less than in cases of cerebro-spinal 

 fluid from meningocele and hydrocephalus, previously recorded by one 

 of us (W. D. H.).* 



In addition to the foregoing, two specimens were collected at home 

 by the patient herself. Analysis of these gave the following results : 



A. Fluid collected while patient was sitting upright quietly. The 

 percentage of solids was Til. 



* ' Jo urn. of Physiol.,' vol. 10, p. 232. 



