CORRECTION. 



The accompanying pages are to replace pages 23 and 24 of The Journal of 

 General Physiology^ September 20, 1918, Vol. i, No. 1. In the first line of the 

 title as originally printed thyroid was written for thymus. 



CORRECTION. 



On page 23, Vol. I, No. 1, September, 1918, line 1 of the title of the article, 

 for thyroid read thymus; the same correction should be made in the Contents. 



