128 



PRACTICAL MICROSCOPY. 



telescopic walking-stick with all its fittings as shown in 

 Fig. 113, is an article generally used by all. There are 

 generally supplied with it, a ring to carry a fine muslin net, 

 a ring to hold a bottle, a weed knife, a spoon, and a drag 

 hook for weeds. 



FIG. 113. 



Mr. Baker, of Holborn, supplies the article in rather a 

 different form : the bottom ring is not clamped by a screw 

 as shown in the figure, but is furnished inside with a thread, 

 into which is made to screw the neck of one of the York 

 Glass Co.'s bottles. 



For many purposes a pond scoop is required, such as for 

 scraping the surface of the mud at the bottom of pools 

 when searching for Oscillatoria, &c., and if it is made to 

 screw into the end of the collecting stick it will be .very 

 convenient. It is simply a ring of 

 tinned iron about 5-inches in dia- 

 meter and i -inch deep. Both edges 

 are "wired," as the tinsmiths call 

 it, so that a piece of thin muslin or 

 stout gauze may be stretched tightly 

 over it. It is shown in Fig. 114. 



Some collectors prefer to secure the muslin over the 

 scoop with a firm elastic band, so that after collecting it 

 may be removed and folded up for transport home and 

 perhaps this is the better plan. 



FIG. 114. 



