6 DEPARTMENT BULLETINS NOS. 476-500. 



I >i-:iwi;tmi-:\ r Bulletin No. 189. -A SURVEY OF BEEKEEPING IN NORTH 



Carolina: Page. 



I in mi I ii. lion ] 



Presenl conditions 2 



Possibilities under North Carolina conditions 13 



Nee Is of I le beekeeping industry in North Carolina 16 



Summary 10 



)i:partment I>i lletin No. 490. — A Preliminary Report of the Occi r- 

 iience of Western Red-rot in Pinus Ponderosa: 



Intro lu lio'i 1 



Des -ription of western re l-rol 1 



Development of w estern re l-rol in the tree 2 



• iomparison of western red-rot and true red-rot 3 



( !ause of western rod-rot 3 



Entrarj e of western red-rot into living tree3 4 



External signs of western red-rot 4 



Area- examine 1 Eor w< stern red-rot 5 



Number and kind of tree- examined 5 



Western re l-ro1 in bla :1c ja k and yellow pine 7 



Western re l-rol and the rotation for western yellow pine 7 



Summary ■. : 8 



Department Bulletin Xo. 491. — The Melon Fly in Hawaii: 



Intro lu t ion 1 



I >rigtn 2 



Distribution _ 3 



Source of Hawaiian infestation 4 



Early history in Hawaii 4 



Lit erature 5 



Economic importance 7 



Inj ury 8 



Food plants 12 



Life history and habits 18 



Length of life cycle 43 



Seasonal history 44 



Method of spread 44 



Con trol measures 45 



Summary 55 



Bibliography 57 



Jepartment Bulletin No. 492. — An Economic Study of Farming in 

 Sumter County. Ga.: 



Introduction 1 



Summary of results 2 



Soun es of information 3 



Area studied .' 3 



Method of pro- edure 6 



Utilization of the farm area 7 



Farm tenure 10 



Size of farm 35 



I )i \ erai I y i if farm receipts 52 



The relation of size of farm and yield per a< re of cotton to profits 54 



The ( ost of prodiu ing cotton 56 



Department Bulletin No. 493. — A Study of American Beers and Ales: 



Introduction 1 



Method of undertaking the investigation 2 



Method of analysis 3 



Results of analysis 3 



Effe t of raw materials used upon composition of the finished brew 11 



1 illusions 23 



Department Bulletin No. 494.— A Humidifier for Lemon Curing Rooms: 



Introduction 1 



( >bje l of the experiments 2 



Plan of the work 2 



Methods tried Eor increasing the relative humidity 3 



The invention of the humidifier 4 



