386 



Motion of Gaseous Bodies. 



No. 52884 



rrj-Jj) 



52 886 B. 1:5. 



52887. 1:10. 



52 885. 1 : 8. 



52 886 A. 1 ; 8. 



52888. 1 : 10. 



Motion of Gaseous Bodies. 



Piston Vacuum Pumps of various Systems. 



I 8. (1. 



52.884. Small Stopcock Vacuum Pump, on iron base, with obliquely inclined cylinder 28 nun 

 internal diameter and 230 mm length, glass plate 140 mm diameter, piston for hand 

 motion, without receiver ............................ 2. 0. 



Largest Receiver for use with above: No. 53 009 ..................... 0. 2. n 



52.885. - - idem, mounted on massive iron screw clamp, Figure, barrel 30 mm internal 

 diameter, 300 mm long, piston for hand motion, glass plate 140 mm diameter (M. T. p. 121 ) i". <>. o 



52.886. - - i d e m, larger, Fig. 52,886 A, on massive Iron Base, with barrel 32 mm internal 

 diameter and 280 mm length, glass plate 180 mm diameter, with one iron Screw Clump. 



Fig. 52,886 B, for firmly clamping to the table, without receiver ......... 3. 0. o 



Largest Receiver for use with above: No. 53,011 ..................... d. 3. o 



.")_'. SX7. Vacuum Pump, Figure, on heavy iron base, piston movable by rack and pinion. 

 cylinder 40 nun diameter, 290 mm long, glass plate 200 mm diameter, steel cock, with 

 large jack, to enable it to be turned even when the tallow is hard, with S^iron 

 Screw Clamps, see Fig. 52 886 B, without receiver ............. * 6. 0. 



The freezing experiment with water ;uid sulphuric acitl can lie carried out with this Vacuum 

 Pump: a vacuum up to 4 mm mercury column is attained in a receiver containing up to 2 litrc>. 

 - Largest receiver for use with almve: No. ,'53,(ll-2 ....................... 0. 4. 



.Vj.xss. Vacuum Pump, Figure, with cylinder 60 mm internal diameter and :'>5<i mm 

 length, glass plate 2."id mm diameter (W. D. Kiir. 165 [152]), with 2 iron Screw Clamps, 

 Bee Fig. 52,886 B, without receiver ..... .................. 8. 0. Q 



Lar^e-l Receiver for n-e with almve: Nr. .">:!. Oil ..................... O. .">. (i 



It is. however, advisable to select the next smallest. No. ."i3.OI3 .............. 0. 4. 8 



52.XSH. idem, with Barometer Gauge attached, with two iron Screw Clamps, 



FL<. :,:! s,s(i 1! . 



9. n. 



Water Air Pumps: sec pp. L'-J _;. 



' 'i :; 

 9J9, 



