26 



Equipment of the Class Rooms. 



No. 50 148 - 





50 148. 1 : 4. 



50 149. 1 : 7. 



50150 50161. 1: 16. 



50 164 a. 1:10. 



50.148. Water Air Pump and Water Jet Blower, Figure, with water gauge, cut-off tap 

 for the aspirated air, and vacuum gauge, tap with movable point for the hose, for the 

 compressed air, and with delivery cock; cylinder bronzed 



This apparatus sucks about 20 litres of air per minute with 3 atm. water-pressure and 10 litres 

 water-consumption per minute. 



50.149. - The preceding, with pressure gauge and pipe union, with tap (F i g u r e), 

 for placing over the water basin of the lecture table 



Large Water Jet Blower; can also be used as a Water Air Pump, Figure, for 

 Chemical and Physiological Laboratories. 



With 1 



Necessary width of piping mm 13 

 Of Sheet Zinc, / List No. 50,150 



3.0.0 

 50,153 

 3. 10. 



bronzed 

 Of Sheet Copper, 



bronzed 



\ Price 

 \ List No. 

 I Price 



2 



19 



50,151 

 3. 15. 

 50,154 

 4.5.0 



3 injectors 



25 



50,152 



4. 10. 



50,155 



5.0.0 



. s. d. 



2. 6. 



3. 10. 



so 



X 



o 



sr 



o 



CD 



O 



(6 



The preceding, with lead pipes and glass tube for observing the pressure of the 

 water column to be overcome. 



1 



13 



50,156 

 3. 15. 



With 



Necessary width of piping mm 



Of Sheet Zinc, ( List No. 



bronzed ( Price 



Of Sheet Copper, ( List No. 

 bronzed ( Price 



For above: 



50,159 

 4.5.0 



2 



19 



50,157 

 4. 10. 



50,160 

 5.0.0 



3 injectors 



25 



50,158 

 5.5.0 



50,161 

 5. 15. 



50.162. Spring Vacuum Gauge, with silvered scale, 55 mm diameter, on iron base, with 2 hose unions . . 



50.163. Non-return Valve (for screwing on) 



50.164. Pressure and Vacuum Gauge (L a n d o 1 t's), as Figure 50,164 a, for measuring 

 the pressure of the compressed and rarilied air, 80 cm long, with opaque glass scale let 

 into glass, graduated in 1 /. 2 cm, on polished wood board, for fixing on wall. With 

 T-shaped hose piece without cock 



50,164 a. --The preceding, with 3-way cock in the centre of the T-piece (F i g u r e) 



0. 18. 

 0. 5. 



0. 15. 



0. 18. 



CI. 3186,4954,3187,3188. 



