ii MTI:K vnr. 



may be employed. The simplest of 







the cutting the edge of tin- src-tion that begins to 



..-lit and held down on tin- Made of the knife by 



mid-hair brush with a Hat point, or by a 



. im l:i mad.- by running a piece of paper on .to the 



Jpcl. ( ) r . which is much better, the section is 



held d.'wn l-v means of an instrument called a " section- 



Tin's consists essentially of a little metallic 



,.,,1! :,ded over the object in be cut in such a way as 



.Hi its five surface with a pressure that can be 



delicately ivj-nlated so as t> be sufficient to keep the section 



A 



tlat without in any way hindering the knife from gliding 

 beneath it. 



the <li'>i-rii>ti"]i- <>(' v;iri<us forms of section-stretchers, ZooL 



. vol. \i. 1^:'.. i'. !<>o (ScnrLTZi:); Mitth. ZooL Stat. Ncapel, iv. 



MAYER, A.\I>I;!:S. and GIESBRECHT) ; Arch. nu'l-. Au<it., 



\\iii. l xx l. p. : '-'-~ l>i.' KEB : ///"/. ,W. ///*/. Mic., x. 1883, p. 55 (FRAN- 



/'/, Micr( Frhnuiiy. KS). (GAGE and SMITH); WHIT- 



M. ///. i'ti M>'<-. Anat., 1885, p. !1 ; /< /7. wiss. Nil:., iv, 1887, p. 218 



'. ./ . \. is 1 .':;, p. 1 ',7 (BORN). The best are those of Mayer 



li'Tll. 



I find that MAYKK'S, beautifully made by JUNG,, works 

 admirably and is most valuable. 







\'"ther phni ig to nllow the sections to roll, but to control 



'he rolli' To this end. the block of paraffin is pared to the 



-hajie nt a wcd-jv live or six times as long as broad,, the 



"bjri-t lieiiiL'- contained in the broad part, and the edge 



turned t(i\v:irds the knife (see Fig. 4). The sections are 



allowed to roll and come oil' as coils, the section of the object 



MI the outermost eil, which will be found to be a very 



"I" 1 " ' indeed, very nearly tlat. Lay the coil on a slide 



'nd downwards, warm gently, and the part con- 



objecl will unroll completely and lie quite flat. 



denali, Napoli, ]{)();}, p. 51) and 

 V- //. /!. Ual. } 11K)(), p. KM.) lay a strip 

 -pajier on the bhck. 



A defect opposite to that !' the rolling of sections is the 



:i "d the eriim].ling or puckering of sections, 



'"'"iig that the p;ir:iHin h;is been compressed by the knife 



"' "' being merely cul true by it. Such sections 



