ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



1021 



Fig. 162. 



looked which with the Microscope would have been easily recognized 

 as such. Especially annoying is it when, with collecting-glasses full, 

 fresh finds are made, and the question as to what has to be thrown aside 

 has to be answered by macroscopical examination alone. 



For excursion purposes the ordinary instruments are too heavy. The 

 cheap school or " Salon " Microscopes are easy of transport, but not 

 sufficiently good for the purpose. The only useful instrument, the so- 

 called Algensucher of Zeiss, has the 

 disadvantage that it only gives a 

 very small field of view, so that 

 small interesting objects may be 

 easily overlooked, and much time is 

 consumed in setting up the object. 



These considerations induced the 

 author to attempt to combine the 

 advantage of easy portability with 

 the use of a good instrument. The 

 instrument devised by him, and 

 shown in fig. 162, was constructed 

 by Herr E. Winkel of Gottingen, 

 and has been proved by use to be 

 admirably suitable for the purpose 

 intended. The weight of an ordinary 

 Microscope is centered chiefly in the 

 stage, the pillar, and the foot. In 

 the present instrument the stage is 

 made as small as possible (52 mm. 

 by 52 mm.) and the pillar and foot 

 dispensed with altogether and re- 

 placed by an ordinary stout walking 

 stick provided with a sharp ferule. 

 The stick is fixed upright in the ground, and thus affords to the Micro- 

 scope attached to it a most convenient position for observation. The 



Fig. 163. 



Fig. 164. 



instrument, for convenience of transport, is made up of three parts : the 



stick, near the handle of which is firmly screwed a metal plate (fig. 163) 

 1888. 3 z 



