X. SPECIAL COLLECTIONS. 807 



42. Diopter, by " Wirsig." 



43. Camera, " Wollaston's." 



44. Diagraph, by " Tavard," modified by Broca. 



45. Designer, by Broca. 



46. Pantograph. 



47. Parietal toniometer, by M. Quatrefages. 



48. Occipital level, by M. Broca. 



49. Arteria basileris level, by M. Broca. 



50. Occipital toniometer, with dial^ by M. Broca. 



51. Do. do. rectangular, by M. Broca. 



52. Caliper compasses, treble-armed, by M. Broca (2). 



53. Auricular toniometer, treble-armed, by M. Broca. 



54. Cephalic fan, by Second. 



55. Rhinometer. 



56. Intra-cranium holder. 



57. Sphenoidal key. 



58. Optical probe. 



59. Turisk key. 



60. Acoustic infra-cranium probes (2). 



6 1 . Optical-o ccipital probe . 



62. Double disk for reconstructing compasses. 



63. Cranioscope, by M. Broca. 

 4. Pivot, by Charles Bell. 



65. Frame, by Pierre Camper. 



66. Double frame, by Luca. 

 7. Frame, by Leach. 



68. Craniometer, by Barclay. 



69. Craniometer, by Bernard Davis. 



70. Do. by Busk. 



71. Toniometer, by Morton. . 



72. Apparatus, by Mantegazza. 



73. Spindle. 



74. Standard litre measure. 



75. Half litre measure, graduated. 



76. Funnel, with its operculum. 



77. Double litre measure. 



78. Shaft (or handle). 



X. SPECIAL COLLECTIONS. 



PHYSIOLOGICAL AND OPHTHALMOLOGICAL INSTRUMENTS CONTRI- 

 BUTED BY THE PHYSIOLOGICAL LABORATORY AND OPHTHAL- 

 MOLOGICAL SCHOOL AT UTRECHT. 



3951. Moist Chamber for micro-biological researches. 



Prof. Engelmann, Utrecht. 



Metallic box, length 80 mm., width 40 mm., depth 7 mm., thickness of the 

 plates 8 mm., bottom, a glass plate. Lid with central opening 15 mm,, 

 diameter closed hermetically by a glass cover. 



Drop with object to be placed underneath the covering-glass. Some drops of 

 water on the glass bottom keep the chamber moist. The lid is pressed 

 against the upper surface of the chamber by two steel springs. If air-tight 

 closing is required the edges of the lid are greased. Each of the small side s 



