29. Tabes dorsalis (tabetic neurosyphilis): six tests apt to run mild 141 30. Tabetic neurosyphilis, clinically atypical 143 31. Cervical tabes 146 32. Erb’s syphilitic spastic paraplegia 147 33. Syphilitic muscular atrophy 149 34. Neurosyphilis of the secondary period 151 35. Juvenile paretic neurosyphilis: optic atrophy 154 36. Juvenile paretic neurosyphilis 157 37. Simple feeblemindedness, syphilitic 159 38. Juvenile tabes 161 SECTION III. PUZZLES AND ERRORS IN THE DIAGNOSIS OF NEUROSYPHILIS (INCLUDING NON-SYPHILITIC CASES). CASES 39–82 165 CASE 39. Paretic _versus_ diffuse neurosyphilis. Autopsy 165 40. Paretic _versus_ vascular neurosyphilis, cerebellar. Autopsy 169 41. Paretic _versus_ vascular neurosyphilis, cerebellar. Autopsy 172 42. Tabetic combined with vascular neurosyphilis. Autopsy. 175 43. Tabetic neurosyphilis: mental symptoms, non-paretic. Autopsy 177 44. Cerebral gliosis. Autopsy 180 45. Neurasthenia _versus_ neurosyphilis 183 46. Hysteria. Neurosyphilis of the secondary period 185 47. Manic-depressive psychosis _versus_ paretic neurosyphilis 187 48. Cerebral tumor 190 49. Early post-infective paretic neurosyphilis 192 50. Atypical paretic neurosyphilis, hemitremor. Autopsy 197 51. Paretic neurosyphilis. Autopsy 199 52. Manic-depressive psychosis _versus_ paretic neurosyphilis 202 53. Syphilitic(?) exophthalmic goitre. Autopsy 205 54. Argyll-Robertson pupils 209 55. Argyll-Robertson pupils: pineal tumor. Autopsy 212 56. Neurosyphilis(?) with negative spinal fluid 216 57. Disseminated syphilitic encephalitis, seven months post-infective. Autopsy 218 58. “Pseudoparesis” 222 59. Syphilitic paranoia? 225 60. Paretic neurosyphilis _versus_ alcoholic pseudoparesis 227 61. Alcoholic pseudoparesis _versus_ paretic neurosyphilis 231 62. Alcoholic neuritis and paretic neurosyphilis 234 63. Chronic alcoholism _versus_ paretic neurosyphilis 236 64. Neurosyphilis, diabetic pseudoparesis, or brain tumor 238