BAIRD cVTATLOCK (LONDON) LTD. 



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This yields four main pieces : 



I. Mastoid part with whole tympanum, chorda tympani, hammer and anvil bones. 

 II. Jaw-joint part with a. maxillaris interna and the third branch of trigeminus. 



III. Vertebral column part with large vessels, nerves, the labyrinth and the stirrup bone (stapes). 



IV. Pharynx part with ganglion seminulare (Gasseri) and the Nn. petrosi. 



As a whole the model shows on the outside the exterior ear, on the inside that part of the cranium which 

 contains the 3rd izth brain nerve, the n. suboccipitalis and the a. vertebralis ; in front the pharyngeal space, 

 behind a section through the back of the head. 



In detail, Part I. shows the tympanum (Piece 5) removable with exterior and interior tympanum folds and 

 pockets ; the cranial part (main piece) shows the descending part of the n. facialis and its division in the parotis, 

 further a vertical section of the concha and the exterior cartilaginous and bony ear-passage with the different 

 curves. Part II. shows the exterior part of the concha with the m. tensor veli palatini and in front the chorda 

 tympani in connection with the n. lingualis. Part IV. shows the back part of the pharynx with the tube opening 

 them, levator veli palatini, the m. tensor tympani, Ganglions emilunare (Gasseri) , Ganglion oticum, the upper 

 pharynx-muscles and vessels. Part III. is very complicated, because it contains the labyrinth. 



When the tegmen tympani is lifted up, after the whole model has been put together, one gets a view into the 

 antrum tympanicum and the tympanic cavity with the little ear bones. Then the cover of the interior ear passage 

 (Part 7) and the n. facialis and acusticus (Part 8) and further the cover for the upper and back semicircular canal 

 can be removed. Also the connecting piece between the cochlea and saccus endolymphaticus is movable (Part 10). 

 The closing plate of the interior ear-passage with the exterior and interior openings for the branch of n. acusticus 

 (aerae et maculae cribrosae, recessus ellipticus, etc. , as Part II.) can be removed. The labyrinth can be removed 

 as a whole as also its bony boundaries (plexus tympanicus [Jacobsoni] fenestra ovalis and triquetra, v. canaliculi 

 cochlea), particularly for the demonstration of the bulbus superior of the v. jugularis interna. For this purpose, 

 moreover, the bone-cover above the emissarium condyloideum posterius (Part 24) is to be removed as well as in front 

 the a. carotis interna with the large nerves (Part 15). The base-part shows internally the opened sinus sigmoideus, 

 outside the same dissected to show the emissarium mastoideum, the exterior and back semi-circular canal and the 

 saccus endolymphaticus. The model can be obtained with the stirrup bone (Part 16) either removable or fixed as 

 desired. The proportions, the dimensions, etc., of the various parts are modelled according to Schwalbe's 

 " Lehrbuch d. Sinnesorgane." The model is about 45 cm. high, 65 cm. long, 60 cm. wide, and is spoken of by 

 some of the greatest authorities as a first-class model for teaching purposes. 



6032 1 Preparation with Nerves and Muscles of Tongue and Ear (tongue and the organ of 

 hearing in natural size). The opened os temporale shows the whole interior mechanism of 

 hearing. Very instructive preparation (see 4h) . . 



6033 T Tongue, dismountable, natural size 



6034 r Nose, considerably enlarged, represented in two halves. One part represents the bridge 

 of the nose, the other the external wall, turbinated bones, etc. All the arteries, nerves 

 and veins are visible. Very instructive preparation 



6035 1 Three Horizontal Sections of the Head modelled from nature (Prof. Frankel). The 

 sections give a true image of the nasal cavity and of all the adjacent parts. Instructive 

 and scientific preparation 



SKIN. 



6036 T Vertical Section through the Skin, 200 times enlarged, showing the three principal 

 layers, sebaceous and sweat glands, hair roots, muscles, arteries, and veins \ . . 



ORGANS OF RESPIRATION. 

 6037 1 Larynx, natural size, with muscles, divisible into two parts . . 



6038 1 Larynx, natural size, with cartilages and ligaments, divisible into two parts . . 





3 17 

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2 2 

 360 



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086 

 10 6 



CROSS STREET - HATTOTST GARDEN, E- C 



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