Septemukr, 1911. 



KNOWLEDGE. 



341 



ground. This I find quite high enough for vertical 



tube work. Indeed, perhaps twenty-five inches 



would be a more generally convenient height for 



an ordinary chair and sitter. 



This sliding part stows con- ' 



veniently out of the way ; 



along the edge of the recess. 



The open cupboard shows 



the microscope case also out 



of one's wav. 



Before winding up, per- 

 haps I ina\' mention two 

 very simple contri\-ances. 

 which I ha\e long used 

 with great convenience. 



Figure 6 shows a straight 

 bit of wood about a foot 

 long, two inches wide and 

 one inch thick. In it are a 

 number of circular holes 

 large enough to take the 



(c) 

 id) 



Another glass rod with knob end for applying 



a larger drop. 

 A handled shar[)-pointed knife. 



(e) A curved needle for 

 ' tearing out tissues. 



(/) A double-edged spear 



knife. 

 To save repetition the 

 parts in all the figures are 

 uniformly lettered. 

 A Typewriter shelf. 

 H and C left and right hand 



portions of hinged top. 

 D Draw slide. 

 E Hinged flap snpported by 



hinged side bracket. 

 V Sliding front of depressed 



table top. 

 G and H Tongue and groove of F 

 J Objective holder. 

 K Upper drawer. 

 L Lower drawer. 

 iM Cupboard. 



Figure 5. 



immersion oil bottle, 



and a number of brass 



cases of objectives. A 



strip of card glued on 



the bottom of the wood 



prevents the things 



slipping about when it 



is moved. It is kept 



out of the way and \et 



convenientlyathandin 



the recess (Figure 3). 

 Figure 7. .\ stiff 



card shallow box-lid 



in which are cut a 



number of nicks for 



holding tools and pre- 

 venting them rolling about. 



special favourites : — 



(a) Forceps with slide clam 

 (/)) Glass rod with drawn 

 tiny knob for appl 

 when dissecting. 



Figure 7. 

 Here arc half-a-dozen 



out slender point and 

 ving reagents locally 



Figure 6. 



The lower le\el top 

 arrangement on which 

 the microscope rests 

 (Figure 5), also serves 

 admirabl}' to hold my 

 tvpewriter at a con- 

 venient height. The 

 folded over part B 

 ( Figure 3) is then very 

 convenient for writing, 

 corrections, and so on. 

 The back ends and 

 door are all panelled: 

 the back and ends 

 have also styles (Fig- 

 ure 2). The work 

 throughout is in solid oak and darkened by ammonia 

 fuming. The carpenter's cost, not including castors, 

 locks and keys, and brass handles, was four guineas. 

 Doubtless, he would repeat at or about the same 

 price. The workmanship is excellent. I send the 

 carpenter's address to the Editor. 



