Although capillary microscopy was originally described in 1912 by Lombard, little work has been done in this country on the morphology of capillaries in children. Abroad, Müller, Jaensch, Hoepfner and others have made some striking contributions; but for the most part, the physicians in this country are unaware of their work and of capillary microscopy in general. For this reason, I shall briefly review the significant literature and also append a few of my own observations.
The interpretation of capillary visualization depends a good deal on the point of view of the individual observer. Though capillary structure is quite definite, unless great care is exercised, deformities and abnormalities may be read into a normal picture if the observer is of an imaginative disposition. Even the interpretation of photomicrographs of capillaries may vary with the individual. In my own work I have considered all capillaries normal unless an undisputed pathologic structure