30 J- SAKURAI: MODIFICATION OF LECKM.VXX'S BOILIXG 



.solvent into the IjoiJing Jiqiiid or doJiition, the ainoiint of tlie v;i[);*ni' 

 tliu.s liaised in li-oiii Avitliont Ijcinij' roii'iilated liv tli(î lieiu'ht of tlio 

 lamp. The degree of constancy of the température attained in tlii.s 

 manner l)y tlie l:)oilinL;- ]i(|uid i:s really a.jtoni.shing, a moot delicate 

 thermometer, capahle of showing xo-Vo^th of a degree, I'emaining a.]mor>t 

 stationary. 



Dc-'icn'ption of Apparalan. Iiiotead of the tlvree-iieH<:ed ii:!.~-k wiili 

 a piece of platinum wire fixed into tlie bottom and with a c-)mplex 

 condensing arrimgement, used by J Beckmann, I eiP.|>loy, for the hoiliiig 

 vessel, an ordinär}^ U-tube, A, about '2 centimeters in interna! 

 diameter and 21 centimeters in height. Xear the top (jf one hmb of 

 this U-tube, a hole is l)l(jwn out l)y means of the 1)lowpi[>e. wliicli 

 serves for jointing on, with a piece of india-rul)ber tubing, a small 

 side-tube having a glass «topper-cock s. The side-tube is, in its turn, 

 connected with an ordinary Liebig's condenser C. " The boiler for 

 generating the vajjour of the solvent is an ordinary round-bottomed 

 flask T>, provided with a cork, through which |>as.^ the stem of a 

 tapped funnel / and a delivery tube d. The latter is connected, l)y 

 means of a piece of thick india-rubber tubing /, witli w tube e, drawn 

 out and slightly Ijent, at its lower end, so tliat tl)i.< end of tlie tube 

 may just reach the bott<jm of the boiling vessel, wlien tl>e cork, 

 through Avhich it ])asses above, is ßxed into the moutli of the U-tube, 

 neiirest to the b.->iler. This tulje e thus establislies comnuuiication 

 between the boiler and tlie boiling vessel. A tin-pla.te vessel pp with 

 a hole in its bottom and resting upon a tripod serves to enclose the 

 boiler and to protect it from draughts. The boiling >essel is, on the 

 other hand, enclosed by a box made of thick asbestos card-board qq, 

 witli a UKjvable bottom. When the solvent is of low boiling poiiii, 

 such as carloii l)isulphide or ether, a j)iece of plain a..:bcsto:^ card-l)<>ard 

 serves as the botO)m of I he box. and the lioilini;' ^essel is lieaied bv 



