Researches into the structure of the spinal cord

The author having undertaken a series of observations with the view of determining, if possible, the relations which appear to subsist between the spinal nerves and the respiratory nervous centres, was led into a more extended inquiry than he at first contemplated, the results of which are communicated in this paper. After stating that the observations were made, by means of a microscope of the best construction, upon many thousand preparations of the spinal cord of Man, of the Calf, Sheep, Pig, Dog, Cat, Rabbit, Guinea-pig and Frog, he describes the methods adopted in making these preparations. The following are the results of his observations.