1^0 



APPENDIX 



three-quarters down it from its head end, four shallow diagonal gutters leading to the 

 drainage-hole. The vertical tube from the drainage-hole goes through the metal box, and 

 a vessel set on the shelf under the box receives the drainings. In the box are two 

 sockets for electric lamps which warm the air in the box. At the head end of the table-top, 

 rather to one side of the mid-line, is a short curved tube which can be rotated in its socket 

 in the table so that the free end of the curved nozzle can be directed as desired. This tube 

 under its socket joins, below the table-top, a wide metal pipe which runs through the whole 

 length of the warm chamber and jutting beyond the chamber's farther end is there narrowed 

 to a short curved nozzle under the table-top. To this latter nozzle the flexible metal tubing 

 leading from the ventilation pump is attached. The air is therefore delivered warmed to 



Text-fio. 45. Student's operation table, of simplified Brodie pattern, with metal 

 box, warmed by electric lamp, let into top. The flexible tube from the chest-ventilation 

 pump is attached at the tail-end of the table to a wide metal pipe which runs through 

 the warm chamber under the table-top ; at the head end of the table-top this metal 

 pipe is brought up to a short curved narrow brass tube which delivers the air from pump 

 warmed by passage through the length of pipe in the warm chamber. The curved 

 brass tube is made to swivel round towards any desired direction. 



the trachea attached to the nozzle at the head end of the table. A piece of flexible metallic 

 tubing 14'' long, such as is used for connecting Bunsen burners to the fixed gas-supply, 

 connects the respiratory supply nozzle with the tracheal cannula. The rate of rhythm of 

 the puffs from the ' blower ' must be arranged of course by the frequence of strokes of the 

 pump, and must therefore be the same for all the tables which the pump supplies. But 

 the amount and pressure of the air delivered to the lungs at each table is adjustable as desired 

 by adjustment of the tie-clip on the side-piece of the tracheal cannula. More convenient in 

 respect to its occupying less room in the neck-wound is a simple straight unbranched tracheal 

 cannula with a side-hole over which a piece of rubber tube, sheathing the adjacent part of the 

 cannula, can be slipped so as to occlude the side-hole more or less as desired. But for 

 student's work this has the drawback that it soon gets stuck on the cannula and to adjust 

 it requires a wrenching twist which if not carefully done may dislodge the cannula. One 

 Brodie-Palmer pump driven by a small water-can easily serves six separate tables. 



