OF PNEUMATIC APPARATUS. 



189 



FIG. 2176. 



FIG. 2223. 



FIG. 2223.* 



2205. TALLOW HOLDER of polished mahogany, with screw (fig. 2205), p. 190 016 

 Vacuum gauges for air pumps, etc., see Nos. 2321 to 2323. 



Brass Coimectors and Stop-cocks, carefully ground and of best quality; the 

 same in polished iron, being one-half extra in cost : 



2207. STOP-COCK, with 2 male screws (fig. 2207), p. 193 . . 03 



2208. 

 2209. 



030 



with 1 male and 1 female screw (fig. 2208), p. 190 



with male or female thread at one end. and the other conveniently 



turned for connecting caoutchouc tube . . . 3 



2210. STOP-COCK, with male or female screw and union joint for attaching flexible tube 

 (fig. 2210), p. 190 . " .," . . . 050 



POLISHED BRASS CONNECTORS. 



2212. CONNECTORS, with two male or two female screws (fig. 2212), p. 190 010 



2213. with one male and one female screw . . 010 



2214. BLANK NUTS to stop openings or cover screws when not in use, each 010 



2215. THREE WAY OR FOUR WAY CONNECTORS with male or female screws as required, 



(fig. 2215), or (fig. 2215*), p. 190, each . .026 



~2216. BLADDER PIECE, or socket to tie in the neck of a bladder with female screw for 

 stop-cock . . . . . . . 009 



2217. DITTO, DITTO, with longer end for connecting flexible tube to brass fittings, with 

 male or female thread . . . . . 009 



