Was it an accident that Stevens’ phorometer showed the same amount of right hyperphoria in one-ninth of the cases, and in thirteen of thirty-three cases of left hyperphoria? In which of these cases was there anisometropia and of what kind was it? What was the refraction of the two cases of exophoria, two of left and one of right hyperphoria by the phorometer; and was the refraction the same in the six cases which were orthophoric by both rod and prism? Such studies are necessary to a clear understanding of the relative value of these tests. JOHN L. MOFFAT. DEAR DR. DEADY: Your letter and inclosed article on “The Maddox Rod or Phorometer; Which?” has been received and examined with interest. I have examined a good many cases in my office by both methods and find variable results, but where there is a radical difference I have found the Maddox rod the more accurate, and from experience I have learned to rely upon it instead of the phorometer, as in prescribing prisms in hyperphoria in connection with glasses for constant use I rely wholly upon the rod test. J. M. FAWCETT. DEAR DOCTOR: Concerning the discussion of Maddox Rod vs. Phorometer about which you wrote me—can say that I believe that the Maddox rod is the more reliable test. My reasons on theoretical grounds for so believing are briefly these. Given a case for examination; the test which _least disturbs_ the muscular co-ordination under investigation must give the best result. Now I think that when we throw the images into non-corresponding retinal points that we almost certainly cause some tension of certain muscles, because it is putting the eyes in an _unnatural_ relation with one another; and this is done by the phorometer. The Maddox rod is theoretically free from this objection. _Practically_ the deviations are more certainly measured, because a patient _knows_ when the streak cuts the light; and you cannot trust their eye alone to tell when the lights are exactly in a line. Have used _both_ tests in every case I have examined in my private practice, and I find the Maddox the more reliable test. It is more to be depended upon. EDW. HILL BALDWIN. ABSTRACTS FROM CURRENT LITERATURE. =Grant, Dundas.—Case of Emphysema of the Orbital Wall of the Anterior Ethmoidal Cells, Caused by blowing the Nose.=—_Jour. Lar., Rhin. and Otol._, March, 1900. This case was shown to the British Laryngological, Rhinological and Otological Association.