BAIRD ii. TATLOCK (LONDON) LTD. 



5953-5954 



5957 



5958 



5953 Apparatus to show the contraction in volume of oxygen and hydrogen on their union 



to form steam. Price complete with metal stand . . . . . . . . ..136 



5954 Price complete with wood stand . . . . . . . . . . . . . . 17 6 



Consists of U tube with stopcock and platinum electrodes at closed end. The closed limb is also encased in 

 an outer tube or jacket, through which passes the vapour of amyl alcohol (which boils at 125 C.), the excess being 

 condensed in glass worm attached. 



The U tube is first filled with mercury, and then two volumes of hydrogen and one of oxygen are introduced, 

 and after the level of the mercury is carefully adjusted, their united volume is noted (the temperature of the gases 

 and of the amyl alcohol vapour being the same) . The open limb is closed with a cork, and the mixed gases exploded 

 by a spark from an induction coil, producing steam, which, after the level of the mercury has been again adjusted, 

 will be found to fill only two-thirds of the space previously occupied by the mixed gases. 



5955 Worm Condenser and Stand, for above . . . . . . . . . . ..040 



5956 Glass U Tube, with stopcock and steam jacket only, as Fig. 5953-5954 076 



5957 Apparatus to show that hydrogen and chlorine combine without alteration of volume, 



consisting of tube with two stopcocks and platinum electrodes . . . . . . 090 



5958 Apparatus to show that hydrogen and chlorine combine without alteration of volume, 



consisting of tube with two stopcocks with bulb and platinum electrodes . . . . 090 



5959 



5959 Apparatus to show that hydrogen and chlorine always combine in equal proportions . . 



5960 Apparatus, as above, on metal stand with clamp 



Consists of a tube stoppered at each end, and with stopcock dividing the tube into two unequal parts, one 

 part being twice as large as the other. If hydrogen be introduced into one end of the tube, and chlorine into the 

 other end, the stopcock opened, and the tube exposed to sunlight, hydrochloric acid will be formed, and on one 

 end of the tube being placed in water, and the stopper withdrawn, the water will rush up, absorb the hydrochloric 

 acid, and on the levels being adjusted inside and outside the tube, the gas (hydrogen or chlorine, whichever had been 

 admitted in excess) will be found to occupy one-third of the tube. 



079 

 13 



PCHEMICAL AND SCIENTIFIC APPARATUS AND PURE CHEMICALS- 



