tence. So far, so good. 



The next move is to refix the valve, when the pump can be 

 worked as before and just as often as circumstances necessitate. If, 

 for instance, a reasonably good vacuum is obtained, all beads and 

 bubbles will cease to appear after the pump has been worked six or 

 eight times. The bubbles and beads will decrease in amount as the 

 work proceeds, but the receiver should not be removed until they 

 cease to appear either in tlie oil or upon its surface. 



The student, who regards this business as being too tedious for 

 him, may rest assured that he cannot get an ideal dressing by any 

 other known means. 



The line has now to be dried out of doors, but it is better to 

 leave it in the dressing for a hne day than to hang it up in wet, or 

 even in damp, weather. 



First cut three fairly stout props, say, as thick as a walking stick. 

 These are to support the line and prevent it from stretching. Also 

 get two stout sticks, say, as thick as your wrist, and fix one into the 

 ground chosen for the purpose. Now, without wasting an atom more 

 line than can be avoided, tie the end to the stick, man's height, while 

 your servant holds the tumbler beside you. Leave him there while 

 you ftx the props in a straight line with the stick, about thirteen yards 

 apart. 



In taking the line out of the oil, get him to iiold it lightly between 

 his thumb and forefmger placed just above the tumbler, so that while 

 he walks back towards the first prop the surface oil drops into it. 

 Upon reaching the prop place the line in the fork j'ourself, being 

 careful not to allow the wet dressing to come in contact with the 

 ground. Continue to take the line from the oil in the manner 



