Fig. 8.

Figures from Corning’s 1888 article, Corning JL, XXI—A Further Contribution on Local Medication of the Spinal Cord, with Cases. Transactions of the Medical Society of the State of New York for the Year 1888. 1888: pages 260–269. Figure 1 depicts the solid needle, 3 inches in length, utilized in the apparatus depicted in Fig. 2. Figure 2 depicts the spinal canal, the ‘foramen vertebrae’, and the method Corning utilized to estimate the depth of the posterior border of same. Figure 3 depicts the hollow needle Corning utilized to deliver cocaine using the 6.2 ml syringe depicted in Fig. 4