HO I A TINQ Ui 5S( T8. 



A clip should be used during th< itonlyh 



displacement of the cover, The Blide must now be pul aside in a 

 warm place, until the balsam is bard enough t" allow the super- 

 fluous portion to be removed safely. Sufficient balsam should be 

 hit to form ;i Bloping edge around the i bould be 



hardened for a few days after cleaning Be sure that the balsam i< 

 (|iiiti hard before applying brown cemeut. Tb< ith which an 



i can i»- rearranged, or a chance air-bubble removed, without 

 disturbing the cover glass, constitutes the chief advantage of using 

 beads. A supply of differenl sizes should be kept, and the 

 musl be regulated by the thickness of the object. Pure balsam in 

 collapsible i bes is to be strongly recommended, on accounl of t lie 

 uicciy with which the quantity of balsam required for mountii 

 slide < ■: 1 1 1 be regulated. The neck of the tube should be wiped with 

 a clean cloth moistened with benzole before the screw-cap is 

 placed, in order to prevent the possibility of a little balsam harden- 

 ing in the screw, and so prevent the easy removal of the rap when 

 nexl required. (Scientific and Literary <•■ 



Preparing and Mounting Dissections of the Appendages, etc A < 

 ( 'die's method in dealing with the parts of spiders will also apply to 

 eta. The Bpinnei ad falces havii lively 



removed are placed separately in liq. pot. for .'l '■'< bours; ili< u 

 soaked iii water to remove the potass ; then placed in acetu a< 

 which such pan- of insects, etc., may always be preserved until re- 

 quired for mounting); then again soaked in water; then placed in 

 strong alcohol for a short time; then chared l>_\ mean- of oil of 

 cloves, and, lastly, transferred to turpentine, and mounted without 

 pressun in cells (Studies in Microscopical Science, in. sect. : 



Mounting Minute Insects and Acari in Balsam. Mr A I' M chael 

 describes his process as follows; He first kills the creatures in bot 

 water or spirit. Hard insects and Acari arc best killed in hoi water. 

 which causes tin in to expand their legs, hut water rather injures 

 minute Hies, and spirit is better for them. Next wasb the objects 

 thoroughly in -pint and clean wi hair, clean me- 



chanically and by washing in spirit. Place tl 

 Blip and arrange it with the hair, have it in spirit for such a time 

 as experience suggests, nit the Blip so as to drain oil' 1 he spirit, hut 

 not to dry the object, which should never be allowed m the 



first process to the final mounting. Having di . :' tin spirit, 

 drop on the object :i little oil of cloves, which ' than turpen- 



tine ; slightly warm the slide and pul on a thii 38, which 



must he supported so a- nol to touch tin it until 



thoroughly soaked. If necessary, rem. clean slip for the 



final mount. It may he necessary to arrange the object more than 



