EXPLANATION OF PLATES. 



Plate 1. , 

 a, blackened super foundation ; b, sections of comb built on a 

 strip of blackened foundation as shown at a ; c, comb built on nar- 

 row strip' of foundation as shown at a id, fully drawn comb built on 

 full-piece starter of black foundation ; e, midrib of natural worker 

 comb after removing the cells; /, midrib of comb built on "1898" 

 deep cell foundation ; g, comb that the bees have just begun to draw 

 on medium brood foundation, enlarged about two diameters ; h, like 

 the preceding except that the cells are fully drawn. 



Plate 2. 

 a, cross-section of very heavy foundation ; b, midrib of comb 

 built on very heavy foundation in upper two-thirds, the lower third 

 being natural midrib extended by the bees; c, cross-section of 

 medium brood foundation ; d, like the preceding except that the 

 bees had begun to draw out the cells in the upper two-thirds of the 

 figure ; e, the same as d with the cells farther drawn ; /, a rather 

 heavy super foundation blackened with lamp-black ; g, section of 

 comb on heavy foundation shown at a; h, comb on foundation 

 shown at/; i, the upper two-fifths like h and the remainder natural 

 drone comb ; j, section of thin super foundation ; k, the same as the 

 preceding with the cells partly drawn; I, section of extra thin 

 foundation. 



Plate 3. 

 a, section of comb on thin foundation in upper half, natural 

 comb in lower half; b, natural comb ; c, natural comb cut from side 

 to side of a section of honey; d, comb built on "1898" deep-cell 

 foundation ; e, cells of natural worker comb cut in cross-section ; /, 

 cells of natural drone comb in cross-section ; g, cells -of worker comb 

 in cross-section, the upper one-third of which was built on the 

 foundation shown at / of Plate 2, and the rest is natural. 



Plate 4. 

 a, cross-section of comb cells, the upper third of which were 

 built on "1898" deep-cell foundation; 6, crosg-gection of worker 



