THE ARNETH COUNT IN NORMAL AND IN THYROIDECTOMISED SHEEP

¹ Department of Physiology, McGill University, Montreal, Canada

In the sheep the Arneth count shows a limited distribution of polymorphs among the various classes. The large majority of cells lie in Class I., fewer in Classes II. and III., while Classes IV. and V. are practically unrepresented.

Two or three weeks after thyroidectomy in the young lamb there is a deflection of the Arneth count to the right, so that relatively fewer cells of Class I. appear in the circulation, and more of Classes II., III., and IV. This deflection is temporary, disappearing after a period of three or four weeks, when the proportions of cells in the Arneth classes again become normal.

The writer wishes to acknowledge her indebtedness to Dr John Tait for much helpful criticism.