WITH THE MICROSCOPE. 147 



required for taking these is very simple, and I shall refer to it before 

 describing that for marine or shore trapping. The following ap- 

 pliances have been arranged by Mr. Highley, whose great practical 

 experience is well known, and nothing can be more suitable for the 

 purpose or more ingeniously designed. I therefore recommend the 

 observer to provide himself with the following simple pieces of 

 apparatus. 



A walking stick with a telescopic joint, pi. XXXV, fig. 224, so 

 that its length may be doubled when required, for the purpose of 

 reaching far out into ponds or deep down between rocks, ditches, or 

 river banks. To the end of this, may be screwed a wide-mouthed 

 bottle, which is introduced into the water mouth downwards, after the 

 manner of a diving-bell, and only turned upwards when near the 

 desired object, and in such a way that it may be carried into the 

 bottle with the rush of water. The bottle should then be care- 

 fully brought to the surface. Such objects as are desired should 

 be selected and removed by aid of a. pocket pipette, fig. 224, and 

 transferred to the tubes hereafter described. This pipette consists of 

 a glass tube drawn out to a point and cemented into a German silver 

 tube, which is fitted with a cap, after the manner of a pen case, so 

 as to protect the glass, which may be carried in the waistcoat pocket. 

 Larger objects, such as water insects, young newts, &c., should be 

 caught by means of a small folding net, which also screws into the 

 stick. Tough weeds required for study, or which are covered with 

 animal or vegetable parasites, should be cut away by means of 

 a weed knife, fig. 224. This consists of two knife-edged blades, 

 hinged to form a V-shaped tool, and is likewise adapted to the 

 naturalist's walking stick. When it is desirable to obtain mud, shells, 

 or other objects out of the reach of the walking stick, the micro- 

 scopisfs dredge, fig. 224, may be advantageously employed. This is 

 made after the manner of the larger one, described further on, and 

 figured in pi. XXXVI, fig. 228. The dredge is attached to one end of 

 a length of stout whipcord, the other end being formed into a loop is 

 passed over the collector's foot, the intermediate length of string is 

 carefully laid on the ground, coil upon coil, and the dredge is then 

 thrown far into the water, and drawn over the bottom of the pond as 

 it is dragged to shore. 



Certain Desmids, Diatoms, and other objects which float upon 

 the surface of water, are best secured by means of a skimming spoon, 

 fig. 224. All these appliances are packed by Mr. Highley into 

 a little pocket case measuring 7 by z\ by \\ inches. A com- 

 panion collecting case to this, contains six corked tubes and a pair 

 of forceps. All objects of a similar kind should be selected by 



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