. Transactions . y that is characteristicof a circulation passing through an ever diminishingseries of tubes. If this circulation is impeded from anycause, would not the periphery be the first to show signsof wanting function ? We are comparing the retina to alimb, and if there is failure of circulation in one limbshould we not look for failure in other limbs ? Now theinvestigations of Drs. Bannatyne, Jones, and othershave shown the common accompaniment of Raynaudsphenomena with rheumatoid arthritis. Local syncope,alternating with local asphyxia, are, according to them,among the frequent sympt
. Transactions . y that is characteristicof a circulation passing through an ever diminishingseries of tubes. If this circulation is impeded from anycause, would not the periphery be the first to show signsof wanting function ? We are comparing the retina to alimb, and if there is failure of circulation in one limbshould we not look for failure in other limbs ? Now theinvestigations of Drs. Bannatyne, Jones, and othershave shown the common accompaniment of Raynaudsphenomena with rheumatoid arthritis. Local syncope,alternating with local asphyxia, are, according to them,among the frequent symptoms of that disease. Here,then, have we not the corresponding peripheral evidence ?But, to carry the argument a stage further, if thecomparison of the retina to a limb be a fair one, weshould ex])cct to find in Raynauds disease some failureof function in the ])eriphery of the retina. In avery interesting ])a])er in the British. ,hn(niul,November, 1902, Dr. Snnmcl (h-iws attention to Fia. 68. RIGHT. su MISCELLANEOUS. the fact that in Haynands disease there actually is con-traction of the field of vision. In some cases of rheumatoid arthritis I have tried theeffect of inhalations of nitrite of amyl on the field ofvision, and almost invariably the boundaries have beenenlarged thereby. Any increase, however, is soon lost,and, with the evanescence of the nitrite, the retina, likea tired bird which folds its wings, again relapses intodormancy. The contraction of the field of vision and thesubsequent expansion after inhaling- nitrite are shownin Fig. 70, the continuous line being the field in itsusual condition in a patient suffering from rheumatoidarthritis, whilst the outer broken line shoAVS the effectproduced during inhalation. The rapidity with which theeffect of the inhalation passes off is shown in this chartby the dot and dash line, taken five minutes after thepatient ceased to inhale. The subject, aged twenty-two,belonged to the class of cases in which rheumat
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