402 APPARATUS FOR GATHERING MICROSCOPIC OBJECTS. 



water, the water passing through the cloth, and the objects 

 being retained by the conical bag. When a quantity of 

 material has accumulated, the bag is turned inside out by 

 pulling the string, and the pointed end of the bag is dipped a 

 number of times in water contained in a wide-mouthed bottle. 



Fig. 86. 



The operation of collecting is then repeated. The objects thus 

 washed from the bag are retained in the bottle for examination. 



The common method of examining small objects of this kind 

 is to place a drop of water containing some of the objects upon a 

 glass slide by means of a drop-tube, then to apply a cover-glass, 

 and remove the surplus water by the application of a piece of 

 blotting paper. This answers very well for the smaller objects, 

 but larger ones must be examined in a tank or animalculee trough, 

 which may be obtained at a trifling cost of all opticians. To vary 

 the thickness of the body of water contained in the tank, one or 

 more glass slips are inserted behind the objects. 



— Scieiitijic American. 



When a Forest has been removed by fire or otherwise, it 

 commonly happens that a fresh growth of entirely new plants 

 immediately springs up. This may be partly due to the unusual 

 opportunity for growth thus given to foreign seeds ; but the usually 

 accepted explanation is that the new growth is from seeds which 

 have long lain dormant. 



