Dr. K. Velhagen has written a short description of the experimental surgery practiced on laboratory animals in the study of autonomic functions of the eye. There are taken up in turn the instruments, narcosis and exposure of the eyeball ; then follows a description of the operations on the external muscles, the extra-ocular vessels and nerves, the glands of the orbit, the lacrimal canal and the eyeball. In the chapter on physiologic experiments the following are described: experiments on the surviving eye, when attached to the head, and on the surviving inner ocular muscles, the pupillary reaction, the intra-ocular circulation, the pulling power of the ocular muscles, lacrimal function and corneal pulsation.
This is an excellent exposition of the various procedures which are being used in the laboratory and will be of great assistance to those who are working on these problems, particularly if they are not fully conversant