St [EN( I: G\ 'V,//'. 





I 



known as " B li Ni utral Tim 

 ii i,,. li is simply a disc of 



hi I V pti i ■ 



,1 m thi 



mil always possible. The eye is 



down 



pei placed immediately 



, , hi then I" 



• I. S little i« H Hi-'- is "I i "in ' 



required, bul the 

 whole seen I 

 in e ■ -. lies in 

 "|,ing the 

 illumination 

 in torily, .mi! thi-. 

 is mi in- easil) 

 arrived at, if two 

 lamps :in- used, 



Il >l 111- Hi 



scope as usual, 

 and 'me in illum- 

 inate the paper. 

 A little adjustment 

 of the light in 

 each lamp will then he all thai is 

 - iry. Tlie lamp itsell should 

 he paraffin with a kin. wick. 

 A very suitable uile can he bought 

 for a shilling or two anywhere, 

 and a cardboard screen can easily 

 he made to go round it. The 

 excellent and often elaborately 

 fitted lamps sold by opticians are, 

 of course, very convenient, hut 

 in only absolutely necessary for 

 those who do much work. Their 

 Bealb's Xii thai, great convenience is in the readi- 

 Tint Reflector. ness with which they may he 

 raised or lowered, and the tlal 

 receptacle for the oil, that enables 

 them to he brought close to the table. If a regular 

 mini is, ope lamp he bought it should certainly be of this 

 form, and capable of rotation, so as to enable either the 

 ll at hi the edge of the flame to be used, and it should have 

 an iron chimney holding an ordinary 3m. by lin. 

 glass slid,, in I..- readily and cheaply changed if 



— J 



L 



Live Box. 



cracked. Such a lamp would cost about 25s. A 

 reflector is worse than useless, as it confuses thi 

 rays. 



Some form of compressor, costing from 5s. to a 

 guinea (see Si [ENi I 1 iOSSIP, Vol. VI., p. 29) : a live- 

 box, price 25. 6d. or 5s. ; a pair of stage forceps, 

 price about 5s., and one or two inexpensive glass stage 

 troughs, such as Botterill's trough, complete our list 

 of apparatus : and with an outfit such as we have now 



length, the 

 ii nothing 



mi thin ; 



in the workin 



the h' -ailing ofmii 1 Amongst 



■ 

 ordinal bound 



round with wax ihn.nl .In excellently, camel-hair 



=4 



t 



Si ii.i 



FOR< EPS 



Microscope Lamp. 



brushes, bent or straight scissors, scalpels for dis- 

 secting, dipping-tubes and other collecting apparatus, 

 killing-bottle, etc. The uses of these things are 

 manifest, but do not need enlarging upon here. It 

 may be useful, however, if we give a description nf 



Botterill's Trough. 



an inexpensive dissecting microscope that can be mad, 

 at home for a few shillings, after which we shall add 

 some practical hints as to the best way to use the 

 microscope, its elementary management and care. 

 We shall then conclude these papers with a tew- 

 plain and easily understood instructions on 

 mounting. 



(To be continued. > 



