No. .'.3030. 



Accessories for Air Pumps. 



401 



53028. i : r>. 



53029. 



50,143. Rubber Tubing for Air Pumps, wire clad inside, braided; see No. 50,143, p. 25. 

 per metre 



Price 



g. 

 0. 3. 



Receivers, F i g. 53,011, of good glass with wide flange and grip, finely ground. 



List No. 53,008 53,009 53,010 53,011 53,012 53,013 53,014 53,015 53,016 



Internal Height mm 105 130 160 185 210 235 260 315 365 

 Internal Diam. mm 60 105 80 130 160 185 210 235 260 



P?mp Plate f m a m } ^0 140 140 180 200 240 250 280 320 



ls.9d. 2s.0d. 2s.3d. 3s.0d. 4s.0d. 4s.9d. 5s.6d. 6s.6d. lls.6d. 



The details given in the Table as to the diameter of air pump plates show the smallest glass 

 plate which can be used with the receiver. For instance, Receiver No. 53,014 is suitable for a plate 

 diameter of 250 mm; it is advisable, therefore to choose the smaller one, Nr. 53,013, if the larger is 

 not absolutely necessary. In addition to the largest Receivers suitable for each plate it is desirable 

 to select some smaller receivers for each air pump as the smaller the receiver the more favourable 

 the action of the pump. The largest item given should be selected as well as Nos. 53,008, 53,010 and 

 53,012. We may say that the sizes of receivers suitable are appended to the description of the appa- 

 ratus concerned. 



5 3,01 7. Stuffing Box Receiver, Figure, 105 mm internal diameter, 150 mm internal height, 



for Bell No. 53,069 and Fan No. 53,066 0. 16. 



The air pump plate for this receiver must be at least 140 mm diameter. 



53.018. - - i d e m, 120 mm internal diameter, 160 mm internal height, for above experiments 



and for Electric Cascade No. 53,085 . 0. 18. 



The air pumn plate must be 180 mm. 



53.019. - - idem, 160 mm internal diameter, 210 mm internal height, for the largest air 



pumps having a plate of 200 mm diameter 



1. 2. 



This receiver is necessary for Bells Nos. 53,070 and 53,071 as well as for the double Pan No. 53,067. 



Rubber Discs of soft, red patent rubber for placing on the plate of the air pump so as to do 

 away with the troublesome operation of smearing the receivers with tallow. 

 List No. 53,020 53,021 53,022 53,023 53,024 53,025 53,026 



Diameter mm 145 185 205 245 255 285 325 



0.4.0 0.6.0 0.7.0 0.9.0 0.10.0 0.14.0 0.18.0 



53,028. Drying Apparatus for the air pump, Figure, with stopcock, mercury manometer 

 attachment and 6 Tube Attachments 



The apparatus is arranged for drying by concentrated sulphuric acid. It is ground with great 

 precision, being thus perfectly air-tight. 



1. 0.0 



53,029. Barometric Gauge, small, Figure 0. 8. 



5.S.030. -- idem, larger, tube 200mm long, in glass bell with iron base 1.0.0 



fl. 962, 595i. 



