386 



REPORT — 1865. 



The bottle is to be left over the funnel until f or | of the 'water is driven out 

 of it by the gas, and the assistant being warned that the time for stopping 

 the collection is approaching, the bottle is to be lifted off the funnel at the 

 instant that the assistant calls out that the seconds' hand of the watch bas 

 arrived at the point marked o on the circle, so that it has completed an entire 

 number of revolutions since the collection of gas commenced. 



The exact time at which the collection began is to be written down by 

 the assistant while the operator is collecting, and 

 in the line marked with the number of the bottle, 

 and the time at which the collection ceases to be 

 written down by the assistant in the same table 

 when the operation of collecting is complete. 



The stopper is to be immersed, held by its 

 handle, in the water of the bath for some minutes 

 before the collection is complete, and pressed 

 firmly into the mouth of the bottle while that 

 mouth is under water and held downwards. 



The stopper is then to be firmly tied down into the neck of the bottle, the 

 bottle returned to its place in the box, and the box locked up again till next 

 period of collecting. 



