531 



Ligature of the portal vein causes the liver to become strongly 

 saccharine. The blood also in the system gives a strong reaction of 

 sugar ; and in one experiment the urine yielded just a traceable indi- 

 cation with the copper solution. The fact that the blood thus be- 

 comes saccharine on interrupting the flow of blood through the 

 portal vein, stands directly in opposition to the result that might 

 have been expected under the glucogenic theory. 



In a communication presented to the Royal Society in 1859, it 

 was shown that injury to certain parts of the sympathetic system 

 produces most rapidly a strongly diabetic state. It has since been 

 found that the introduction of carbonate of soda largely into the cir- 

 culation altogether prevents this eifect. 



IX. " A new Ozone-box and Test-slips." By E. J. LOWE, Esq., 

 F.R.A.S., F.L.S. &c. Communicated by JOHN LEE, LL.D. 

 Received April 16, 1860. 



The ordinary form of Ozone-box being very cumbersome, the pre- 

 sent one has been contrived to supersede it*. The box is simple in 

 construction, small in size, and cylindrical in form ; the chamber in 

 which the test-slips are hung is perfectly dark, and at the same time 

 there is a constant current of air circulating through it, no matter 

 from what quarter of the compass the wind is blowing. The air 

 either passes in at the lower portion of the box and travels round a 

 circular chamber twice, until it reaches the centre (where the test- 

 slips are hung) and then out again at the upper portion of the box 

 in the same circular manner, or in at the top and out again at the 

 bottom of the box. 



Fig. 1 represents a section of the upper portion of the box, showing 

 5. l. Fig. 2. 



* A specimen of the instrument was forwarded^with the paper. 



