Xo. 54 964. 



Looser Thermoscope. 



591 



54 963. 1:12. 



54 964. 1 : 9. 



54,962. Accessories lor] Experiments on Radiant Heat (Experiments Nos. 27 to 53), without concave mirror, s. d. 

 Figure 9. 0. O 



For demonstrating the unequal absorption of luminous and dark rays through rock salt and 

 glass, total thermal reflection, thermal absorption of different materials and surfaces (also when thermal 

 sources are unequal), thermal emission of various surfaces, thermal reflection, dependence of radiation 

 on the incident angle. 



2 Teclu Burners (Fig. 15 b). 



2 Attachments with slotted burner for luminous 



flames (Fig. 15 b). 



2 Attachments for non-luminous flames (Fig. 15 b). 

 f 2 large Glass Hemispheres (lamp-blacked) (also 



Fig. 22) 

 2 four-sided prismatic reflectors, nickelled (Figs. 



15 b and 20). 



f 4 thick and 4 thin Glass Plates. 

 . 2 Rock Salt Slabs. 



1 Rock Salt Cube. 



2 small ground Hemispheres. 

 2 Mica Discs and 



1 Gypsum Slab for heat-absorption. 



2 ground Glass Discs. 



2 Glass Troughs for water and solution of iodine 

 in carbon-disulphide respectively. 



_' Stages for the reflectors with wire stands and 

 holders for the glass troughs, on stands 

 (Fig. 15 b). 



2 cylindrical Sheet Iron Capsules for steam 



heating, with a bare and a sooted surface 



(cf. Fig. 19 1 and 4 ). 

 Boiling Flask with T-tube and 2 lengths rubber 



tubing. 

 2 Capsules with glass attachments (Figs. 19 2 



and 19 3 ). 

 f 1 Leslie Cube. 

 1 four-sided prismatic Reflector sooted inside 



(Fig. 15 b). 

 f 2 Stands with rings. 



1 bare and 1 sooted Metal Vessel. 



2 Capsules weighted with shot. 



1 bare and 1 sooted Beaker with thermometers. 

 f 1 Screen (Fig. 21). 

 fl white metal Reflector (Fig. 21). 

 f 2 Holders for 4 candles each, with 8 candles. 



1 Card with circular hole (Fig. 22). 



1 Gas Burner or Candle Holder with pivotted 

 arm, on stand (Fig. 22). 



1 Tube for thermal absorption (Fig. 23). 



Concave Mirrors for Experiments No. 51, p. 48: see Nos. 55,328 55,336. 



54,962. a Small Collection of Accessories for Experiments on Radiant Heat (Experiments Nos. 45, 45b, 46, 48, 

 49), consisting solely of accessories marked t in No. 54,962, for demonstrating thermal absorption, 

 thermal emission of different surfaces, a luminous and a non-luminous flame, thermal reflection, de- 

 crease of thermal radiation with distance . 



1 double Capsule, open (Fig. 24). 

 1 pressure flask (Fig. 25). 

 1 suction flask. 



Sheet Metal Box with corrugated lid, stand and 

 indicating device, brass rod and glass tube. 1 ) 



1. 12. O 



2. 6. O 



54.963. Accessories for Experiments on Heat and Work, Figure (Experiments Nos. 54 64 and 67) .. 



The following can be demonstrated : generation of heat by friction, striking or bending, by shaking 

 mercury and outflowing air; the freeing of heat by condensation, thermal consumption on rarifying 

 gases. 



f 1 Small ground Hemisphere with cork and board. 



f 1 Board with emery cloth pasted on. 



f 1 Wood Block. 



f 1 Wire with a piece of raw tin. 



fl Lead Slab. 

 1 Capsule with mercury (Fig. 24), with long handle. 



Friction Apparatus for the Whirling Table: see No. 52,048. 

 Bellows for Experiments Nos. 17, 67 and 77: see No. 53,088. 



1 ) If No. 54,957 is already available, the price is decreased by the following amount owing to the 

 omission of metal box with corrugated lid, stand and indicating device 0. 18. 0' 



54,963 a. Small Collection of Accessories for Experiments on Heat and Work (Experiments Nos. 54, 55 and 59), 

 consisting solely of the accessories marked | in No. 54,963, for demonstrating heat produced by friction, 

 striking and bending 0. 4. 



54.964. Accessory Apparatus, Figure, for shewing that the cooling of a gas when the pressure is reduced 



is proportional to the difference between initial and terminal pressure (Experiments Nos. 65 and 66) 1. 10. 0- 



2 large Compression Flasks, 4 litres capacity, with 

 connecting tubes; one with cork (Fig. 26), the 

 other with cylindrical capsule, screw stopper 

 and air-pressure manometer (p. 61). 



1 Compression Flask, 8 litres capacity, with con- 

 necting tubes and cork. 



Cl. 6180, 6187. 



