yom ate envivonmont . = a! an 8 evor, - ee wey a at + sye 7 - wayne - “., tho purvovso thoy will co wed eee Beak 21 tho ©ats. buvrow horwiuentnily Late tha mound, and cocss. a! tatzen s bam: or into du this Taw on, hag Ste Jae Ta Pad . pe tond to be tiuch doorar ca for es fener fest dn danpch, . ~ th ” « oO om ae of 2 Tye 7 tet * . athe : a be et bon. : * ot : thints the main vooson for this is thet the soll ef the nouncs is mush solter ” than the codl of the orasslend sinse it has ote? . a oe %, 7 ae a . %,. “> taqeas ae 5 J ate lepson7ad ws7 co thoy enn buvroy into dt a “4% « a . < a” Another olfect moy *be an the t2 Che tres purprvans Pay wet dD b222, A Vere ees St Cao bite whovess tha orcvning 9 1%4 “ em over gfe se under er 2 V2 ea boon L . 4 . move cnsily. aye crassiancs, bus a ry to yeasts on VTS te *, gas Tho ononings elu a3 oeee on _ Comm oes qt taal 9 to tio burrows in the sise of the banks are ate ae? < o« a eo Vey ry foes wn 4 . ad usually uncoverad, 4 Tho ovision of artiticiol ncostang in buevow aron is another effset of prolininary constvuetion, Av fies’ sicsat, At appears to bo a laicht effect, althouzh in the survival of the pestiation it prouwwbly is a magor esfoet. Tho artificial neast- ing arsas are provided for tho most part ny cable traneis which enter into tho insirenont bunkers. These I do not Irn ow the ful ef Thoy ara vnder tha ¢ $ n thon, but it is considerable. Ospth of thres fect to elght foot. The rats apprvar to ks QO fo matoly elsht inches in diemstor. in the bunzers, be- puncant in thes Cause you can Ses Eco as high as 15 in ons buniror Tt eae Hoveves, nuuber of rats is fairly linitdd with rola tion to tho the Gntire colony. This living of the rats ain tho enbie 4unnel magiRt